Hex Cheat - All Cars, Tracks
     To  enable cheats without entering them, open your "options" file
located  in your savegame folder (c:\Colin2005\SG\) with a hex editor.
Go  to  location "Ch" - this is the 13th position from the beginnig of
the file and overwrite with "FF FF". Go to location "10h", this is the
16th  position  from  the beginning of the file and overwrite with "FF
FF".  Now  you have all cars, tracks and even the secret "mirror mode"
activated!  Overwrite  both hex positions with "FF" only if you do not
want the mirror mode. Overwrite with "FF FF FF" to get small RC Cars!

NOTE: Always make a backup before modifying game files.