In the menu type in ISI-CHEESEMAN, this will enable cheat mode. Now
 you can also enter these codes:

 ISI-DELICATE   KittyCat Mode
 ISI-TBONE      Unlock all tracks and vehicles
 ISI-CORSICA    Car Parts maxed Out
 ISI-PLAGUE     Max league = GT3
 ISI-AARDVARK   Credits awarded