[lpmlpm]

Una forma práctica si solo lo usas en una simple forma es usar clases sobrepuestas... prueba con esta implementación:

Código Delphi [-]
 unit Unit1;
 
 interface
 
 uses
   Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
   Dialogs, StdCtrls, FileCtrl;
 
 type
 
   TFileListBox = class(FileCtrl.TFileListBox)
   protected
     procedure DrawItem(Index: Integer; Rect: TRect; State: TOwnerDrawState); override;
   end;
 
   TForm1 = class(TForm)
     FileListBox1: TFileListBox;
   private
     { Private declarations }
   public
     { Public declarations }
   end;
 
 var
   Form1: TForm1;
 
 implementation
 
 {$R *.dfm}
 
 procedure TFileListBox.DrawItem(Index: Integer; Rect: TRect; State: TOwnerDrawState);
 begin
  if odSelected in State then
     Canvas.Brush.Color := clGray
   else
     case Index mod 4 of
       0: Canvas.Brush.Color := clGreen;
       2: Canvas.Brush.Color := clRed;
       1, 3: Canvas.Brush.Color := clWhite;
     end;
   inherited;
 end;
 
 end.