Various Cheats

At the main menu put in these codes

BIGFOOTZ - Huge wheels on vehicles

BOXERZ - Huge hands and feet on drivers

BIGHEADZ - Big heads on drivers

GOKARTZ - Tiny wheels on vehicles

INEEDMORECARS - Everything except generators

TERRAFORMERS - Generate Tracks

INEEDMOREMAPS - More tracks

FONEKART - Extra Level

SPEEDRACER - Faster Race

GLUED - More Gravity

MANONTHEMOON - Less Gravity

UNLOCK ALL CARS

To unlock all cars including the red writer u have to start a new game and pause it in the middle of the game. Then press and hold shift-and then type in sanecars