Go to main menu (where you can select free drive, trophy etc.)
 and press SHIFT. It will bring up a box to enter cheats.
 Enter any of the codes listed below: 
 
 Code - Result 
 ALLTROPHIES - All Trophies Access 
 ALLTIRES - All Tires 
 ALLRDIFFERS - All Rear Differentials 
 ALLFDIFFERS - All Front Differentials 
 ALLENGINES - All Engines 
 RABACAR - Raba Truck 
 BIGFOOT - Toyota Hilux Bigfoot