Press [Shift] at the main menu, then enter one
of the following codes at the prompt box to activate the corresponding
cheat function.

Code
All cars unlocked allcars
All engines unlocked allengines
All trophies unlocked alltrophies
All tires unlocked alltires
All rear differentials unlocked allrdiffers
All front differentials unlocked allfdiffers
Raba truck rabacar
Toyota Hilux Bigfoot bigfoot