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diff --git a/unicode/src/base/UFilesystem.pas b/unicode/src/base/UFilesystem.pas
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+{* UltraStar Deluxe - Karaoke Game
+ *
+ * UltraStar Deluxe is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ * $URL$
+ * $Id$
+ *}
+
+unit UFilesystem;
+
+interface
+
+uses
+  {$IFDEF MSWINDOWS}
+  Windows,
+  TntSysUtils,
+  {$ENDIF}
+  UFilename,
+  SysUtils,
+  Classes;
+
+type
+  {$IFDEF MSWINDOWSe}
+  TSytemSearchRec = TSearchRecW;
+  {$ELSE}
+  TSytemSearchRec = TSearchRec;
+  {$ENDIF}
+
+  TUniSearchRec = record
+    Time: Integer;
+    Size: Int64;
+    Attr: Integer;
+    Name: IPath;
+    ExcludeAttr: Integer;
+    //FindHandle(): THandle;
+  end;
+
+  IFileFindIterator = interface
+    function HasNext(): Boolean;
+    function Next(): TUniSearchRec;
+  end;
+
+  IFileSystem = interface
+    function ExpandFileName(const FileName: IPath): IPath;
+    function FileCreate(const FileName: IPath): Integer;
+    function DirectoryCreate(const Dir: IPath): Boolean;
+    function FileOpen(const FileName: IPath; Mode: LongWord): Integer;
+    function FileAge(const FileName: IPath): Integer; overload;
+    function FileAge(const FileName: IPath; out FileDateTime: TDateTime): Boolean; overload;
+    function DirectoryExists(const Name: IPath): Boolean;
+    function FileExists(const Name: IPath): Boolean;
+    function FileGetAttr(const FileName: IPath): Cardinal;
+    function FileSetAttr(const FileName: IPath; Attr: Integer): Boolean;
+    function FileIsReadOnly(const FileName: IPath): Boolean;
+    function FileSetReadOnly(const FileName: IPath; ReadOnly: Boolean): Boolean;
+    function ForceDirectories(const Dir: IPath): Boolean;
+    function FileSearch(const Name: IPath; DirList: array of IPath): IPath;
+    function RenameFile(const OldName, NewName: IPath): Boolean;
+    function DeleteFile(const FileName: IPath): Boolean;
+    function RemoveDir(const Dir: IPath): Boolean;
+    function CopyFile(const Source, Target: IPath; FailIfExists: Boolean): Boolean;
+
+    function FileFind(const FilePattern: IPath; Attr: Integer): IFileFindIterator;
+
+    function FindFirst(const FilePattern: IPath; Attr: Integer; var F: TSytemSearchRec): Integer;
+    function FindNext(var F: TSytemSearchRec): Integer;
+    procedure FindClose(var F: TSytemSearchRec);
+
+    function GetCurrentDir: IPath;
+    function SetCurrentDir(const Dir: IPath): Boolean;
+
+    function CreateFileStream(const FileName: IPath; Mode: Word): THandleStream;
+  end;
+
+var
+  FileSystem: IFileSystem;
+
+implementation
+
+type
+  TFileSystemImpl = class(TInterfacedObject, IFileSystem)
+  public
+    function ExpandFileName(const FileName: IPath): IPath;
+    function FileCreate(const FileName: IPath): Integer;
+    function DirectoryCreate(const Dir: IPath): Boolean;
+    function FileOpen(const FileName: IPath; Mode: LongWord): Integer;
+    function FileAge(const FileName: IPath): Integer; overload;
+    function FileAge(const FileName: IPath; out FileDateTime: TDateTime): Boolean; overload;
+    function DirectoryExists(const Name: IPath): Boolean;
+    function FileExists(const Name: IPath): Boolean;
+    function FileGetAttr(const FileName: IPath): Cardinal;
+    function FileSetAttr(const FileName: IPath; Attr: Integer): Boolean;
+    function FileIsReadOnly(const FileName: IPath): Boolean;
+    function FileSetReadOnly(const FileName: IPath; ReadOnly: Boolean): Boolean;
+    function ForceDirectories(const Dir: IPath): Boolean;
+    function FileSearch(const Name: IPath; DirList: array of IPath): IPath;
+    function RenameFile(const OldName, NewName: IPath): Boolean;
+    function DeleteFile(const FileName: IPath): Boolean;
+    function RemoveDir(const Dir: IPath): Boolean;
+    function CopyFile(const Source, Target: IPath; FailIfExists: Boolean): Boolean;
+
+    function FileFind(const FilePattern: IPath; Attr: Integer): IFileFindIterator;
+
+    function FindFirst(const FilePattern: IPath; Attr: Integer; var F: TSytemSearchRec): Integer;
+    function FindNext(var F: TSytemSearchRec): Integer;
+    procedure FindClose(var F: TSytemSearchRec);
+
+    function GetCurrentDir: IPath;
+    function SetCurrentDir(const Dir: IPath): Boolean;
+
+    function CreateFileStream(const FileName: IPath; Mode: Word): THandleStream;
+  end;
+
+  TFileFindIterator = class(TInterfacedObject, IFileFindIterator)
+  private
+    fHasNext: Boolean;
+    fSearchRec: TSytemSearchRec;
+  public
+    constructor Create(const FilePattern: IPath; Attr: Integer);
+    destructor Destroy(); override;
+
+    function HasNext(): Boolean;
+    function Next(): TUniSearchRec;
+  end;
+
+
+function TFileSystemImpl.CreateFileStream(const FileName: IPath; Mode: Word): THandleStream;
+begin
+  Result := TUniFileStream.Create(FileName, Mode);
+end;
+
+function TFileSystemImpl.FileFind(const FilePattern: IPath; Attr: Integer): IFileFindIterator;
+begin
+  Result := TFileFindIterator.Create(FilePattern, Attr);
+end;
+
+{$IFDEF MSWINDOWSs}
+
+function TFileSystemImpl.ExpandFileName(const FileName: IPath): IPath;
+begin
+  Result := Path(WideExpandFileName(FileName.ToWideString()));
+end;
+
+function TFileSystemImpl.FileCreate(const FileName: IPath): Integer;
+begin
+  Result := WideFileCreate(FileName.ToWideString());
+end;
+
+function TFileSystemImpl.DirectoryCreate(const Dir: IPath): Boolean;
+begin
+  Result := WideCreateDir(Dir.ToWideString());
+end;
+
+function TFileSystemImpl.FileOpen(const FileName: IPath; Mode: LongWord): Integer;
+begin
+  Result := WideFileOpen(FileName.ToWideString(), Mode);
+end;
+
+function TFileSystemImpl.FileAge(const FileName: IPath): Integer;
+begin
+  Result := WideFileAge(FileName.ToWideString());
+end;
+
+function TFileSystemImpl.FileAge(const FileName: IPath; out FileDateTime: TDateTime): Boolean;
+begin
+  Result := WideFileAge(FileName.ToWideString(), FileDateTime);
+end;
+
+function TFileSystemImpl.DirectoryExists(const Name: IPath): Boolean;
+begin
+  Result := WideDirectoryExists(Name.ToWideString());
+end;
+
+function TFileSystemImpl.FileExists(const Name: IPath): Boolean;
+begin
+  Result := WideFileExists(Name.ToWideString());
+end;
+
+function TFileSystemImpl.FileGetAttr(const FileName: IPath): Cardinal;
+begin
+  Result := WideFileGetAttr(FileName.ToWideString());
+end;
+
+function TFileSystemImpl.FileSetAttr(const FileName: IPath; Attr: Integer): Boolean;
+begin
+  Result := WideFileSetAttr(FileName.ToWideString(), Attr);
+end;
+
+function TFileSystemImpl.FileIsReadOnly(const FileName: IPath): Boolean;
+begin
+  Result := WideFileIsReadOnly(FileName.ToWideString());
+end;
+
+function TFileSystemImpl.FileSetReadOnly(const FileName: IPath; ReadOnly: Boolean): Boolean;
+begin
+  Result := WideFileSetReadOnly(FileName.ToWideString(), ReadOnly);
+end;
+
+function TFileSystemImpl.ForceDirectories(const Dir: IPath): Boolean;
+begin
+  Result := WideForceDirectories(Dir.ToWideString());
+end;
+
+function TFileSystemImpl.FileSearch(const Name: IPath; DirList: array of IPath): IPath;
+var
+  I: integer;
+  DirListStr: WideString;
+begin
+  DirListStr := '';
+  for I := 0 to High(DirList) do
+  begin
+    if (I > 0) then
+      DirListStr := DirListStr + PathSep;
+    DirListStr := DirListStr + DirList[I].ToWideString();
+  end;
+  Result := Path(WideFileSearch(Name.ToWideString(), DirListStr));
+end;
+
+function TFileSystemImpl.RenameFile(const OldName, NewName: IPath): Boolean;
+begin
+  Result := WideRenameFile(OldName.ToWideString(), NewName.ToWideString());
+end;
+
+function TFileSystemImpl.DeleteFile(const FileName: IPath): Boolean;
+begin
+  Result := WideDeleteFile(FileName.ToWideString());
+end;
+
+function TFileSystemImpl.RemoveDir(const Dir: IPath): Boolean;
+begin
+  Result := WideRemoveDir(Dir.ToWideString());
+end;
+
+function TFileSystemImpl.CopyFile(const Source, Target: IPath; FailIfExists: Boolean): Boolean;
+begin
+  Result := WideCopyFile(Source.ToWideString(), Target.ToWideString(), FailIfExists);
+end;
+
+function TFileSystemImpl.FindFirst(const FilePattern: IPath; Attr: Integer; var F: TSytemSearchRec): Integer;
+begin
+  Result := WideFindFirst(FilePattern.ToWideString(), Attr, F);
+end;
+
+function TFileSystemImpl.FindNext(var F: TSytemSearchRec): Integer;
+begin
+  Result := WideFindNext(F);
+end;
+
+procedure TFileSystemImpl.FindClose(var F: TSytemSearchRec);
+begin
+  WideFindClose(F);
+end;
+
+function TFileSystemImpl.GetCurrentDir: IPath;
+begin
+  Result := Path(WideGetCurrentDir());
+end;
+
+function TFileSystemImpl.SetCurrentDir(const Dir: IPath): Boolean;
+begin
+  Result := WideSetCurrentDir(Dir.ToWideString());
+end;
+
+{$ELSE} // UNIX
+
+function TFileSystemImpl.ExpandFileName(const FileName: IPath): IPath;
+begin
+  Result := Path(SysUtils.ExpandFileName(FileName.ToString(pencSystemANSI)), pencSystemANSI);
+end;
+
+function TFileSystemImpl.FileCreate(const FileName: IPath): Integer;
+begin
+  Result := SysUtils.FileCreate(FileName.ToString(pencSystemANSI));
+end;
+
+function TFileSystemImpl.DirectoryCreate(const Dir: IPath): Boolean;
+begin
+  Result := SysUtils.CreateDir(Dir.ToString(pencSystemANSI));
+end;
+
+function TFileSystemImpl.FileOpen(const FileName: IPath; Mode: LongWord): Integer;
+begin
+  Result := SysUtils.FileOpen(FileName.ToString(pencSystemANSI), Mode);
+end;
+
+function TFileSystemImpl.FileAge(const FileName: IPath): Integer;
+begin
+  Result := SysUtils.FileAge(FileName.ToString(pencSystemANSI));
+end;
+
+function TFileSystemImpl.FileAge(const FileName: IPath; out FileDateTime: TDateTime): Boolean;
+begin
+  Result := SysUtils.FileAge(FileName.ToString(pencSystemANSI), FileDateTime);
+end;
+
+function TFileSystemImpl.DirectoryExists(const Name: IPath): Boolean;
+begin
+  Result := SysUtils.DirectoryExists(Name.ToString(pencSystemANSI));
+end;
+
+function TFileSystemImpl.FileExists(const Name: IPath): Boolean;
+begin
+  Result := SysUtils.FileExists(Name.ToString(pencSystemANSI));
+end;
+
+function TFileSystemImpl.FileGetAttr(const FileName: IPath): Cardinal;
+begin
+  Result := SysUtils.FileGetAttr(FileName.ToString(pencSystemANSI));
+end;
+
+function TFileSystemImpl.FileSetAttr(const FileName: IPath; Attr: Integer): Boolean;
+begin
+  Result := (SysUtils.FileSetAttr(FileName.ToString(pencSystemANSI), Attr) = 0);
+end;
+
+function TFileSystemImpl.FileIsReadOnly(const FileName: IPath): Boolean;
+begin
+  Result := SysUtils.FileIsReadOnly(FileName.ToString(pencSystemANSI));
+end;
+
+function TFileSystemImpl.FileSetReadOnly(const FileName: IPath; ReadOnly: Boolean): Boolean;
+begin
+  Result := SysUtils.FileSetReadOnly(FileName.ToString(pencSystemANSI), ReadOnly);
+end;
+
+function TFileSystemImpl.ForceDirectories(const Dir: IPath): Boolean;
+begin
+  Result := SysUtils.ForceDirectories(Dir.ToString(pencSystemANSI));
+end;
+
+function TFileSystemImpl.FileSearch(const Name: IPath; DirList: array of IPath): IPath;
+var
+  I: integer;
+  DirListStr: AnsiString;
+begin
+  DirListStr := '';
+  for I := 0 to High(DirList) do
+  begin
+    if (I > 0) then
+      DirListStr := DirListStr + PathSep;
+    DirListStr := DirListStr + DirList[I].ToString(pencSystemANSI);
+  end;
+  Result := Path(SysUtils.FileSearch(Name.ToString(pencSystemANSI), DirListStr), pencSystemANSI);
+end;
+
+function TFileSystemImpl.RenameFile(const OldName, NewName: IPath): Boolean;
+begin
+  Result := SysUtils.RenameFile(OldName.ToString(pencSystemANSI), NewName.ToString(pencSystemANSI));
+end;
+
+function TFileSystemImpl.DeleteFile(const FileName: IPath): Boolean;
+begin
+  Result := SysUtils.DeleteFile(FileName.ToString(pencSystemANSI));
+end;
+
+function TFileSystemImpl.RemoveDir(const Dir: IPath): Boolean;
+begin
+  Result := SysUtils.RemoveDir(Dir.ToString(pencSystemANSI));
+end;
+
+function TFileSystemImpl.CopyFile(const Source, Target: IPath; FailIfExists: Boolean): Boolean;
+const
+  COPY_BUFFER_SIZE = 4096; // a good tradeoff between speed and memory consumption
+var
+  SourceFile, TargetFile: TFileStream;
+  FileCopyBuffer: array [0..COPY_BUFFER_SIZE-1] of byte; // temporary copy-buffer.
+  NumberOfBytes: integer; // number of bytes read from SourceFile
+begin
+  Result := false;
+  SourceFile := nil;
+  TargetFile := nil;
+
+  // if overwrite is disabled return if the target file already exists
+  if (FailIfExists and FileExists(Target)) then
+    Exit;
+
+  try
+    try
+      // open source and target file (might throw an exception on error)
+      SourceFile := TFileStream.Create(Source.ToString(pencSystemANSI), fmOpenRead);
+      TargetFile := TFileStream.Create(Target.ToString(pencSystemANSI), fmCreate or fmOpenWrite);
+
+      while true do
+      begin
+        // read a block from the source file and check for errors or EOF
+        NumberOfBytes := SourceFile.Read(FileCopyBuffer, SizeOf(FileCopyBuffer));
+        if (NumberOfBytes <= 0) then
+          Break;
+        // write block to target file and check if everything was written
+        if (TargetFile.Write(FileCopyBuffer, NumberOfBytes) <> NumberOfBytes) then
+          Exit;
+      end;
+    except
+      Exit;
+    end;
+  finally
+    SourceFile.Free;
+    TargetFile.Free;
+  end;
+
+  Result := true;
+end;
+
+function TFileSystemImpl.FindFirst(const FilePattern: IPath; Attr: Integer; var F: TSytemSearchRec): Integer;
+begin
+  Result := SysUtils.FindFirst(FilePattern.ToString(pencSystemANSI), Attr, F);
+end;
+
+function TFileSystemImpl.FindNext(var F: TSytemSearchRec): Integer;
+begin
+  Result := SysUtils.FindNext(F);
+end;
+
+procedure TFileSystemImpl.FindClose(var F: TSytemSearchRec);
+begin
+  SysUtils.FindClose(F);
+end;
+
+function TFileSystemImpl.GetCurrentDir: IPath;
+begin
+  Result := Path(SysUtils.GetCurrentDir(), pencSystemANSI);
+end;
+
+function TFileSystemImpl.SetCurrentDir(const Dir: IPath): Boolean;
+begin
+  Result := SysUtils.SetCurrentDir(Dir.ToString(pencSystemANSI));
+end;
+
+{$ENDIF}
+
+
+{ TFileFindIterator }
+
+constructor TFileFindIterator.Create(const FilePattern: IPath; Attr: Integer);
+begin
+  inherited Create();
+  fHasNext := (FileSystem.FindFirst(FilePattern, Attr, fSearchRec) = 0);
+end;
+
+destructor TFileFindIterator.Destroy();
+begin
+  FileSystem.FindClose(fSearchRec);
+  inherited;
+end;
+
+function TFileFindIterator.HasNext(): Boolean;
+begin
+  Result := fHasNext;
+end;
+
+function TFileFindIterator.Next(): TUniSearchRec;
+begin
+  if (not fHasNext) then
+  begin
+    FillChar(Result, SizeOf(Result), 0);
+    Exit;
+  end;
+
+  Result.Time := fSearchRec.Time;
+  Result.Size := fSearchRec.Size;
+  Result.Attr := fSearchRec.Attr;
+  {$IFDEF MSWINDOWS}
+  Result.Name := Path(fSearchRec.Name);
+  {$ELSE}
+  Result.Name := Path(fSearchRec.Name, pencSystem);
+  {$ENDIF}
+  Result.ExcludeAttr := fSearchRec.ExcludeAttr;
+
+  // fetch next entry
+  fHasNext := (FileSystem.FindNext(fSearchRec) = 0);
+end;
+
+
+initialization
+  FileSystem := TFileSystemImpl.Create;
+
+finalization
+  FileSystem := nil;
+
+end.