Colin McRae Rally 4 Cheats

Select the "Secrets" selection at the options menu. Enter one of the following codes at the "Code Entry" screen. Complete the entry by selecting "OK". The cheats can be turned on by selecting them in the list and pressing Right. Note: The game's codes are matched to the bonus code of each game, which will vary. The following codes will only work with discs that have the same bonus code.

Go to options then secrets and enter:
DIHYT exactly the way it is written to unlock group B cars and mode.