Various cheats
     Go  to  the  Career  mode,  then create a new career, at the next
screen enter the code you want to activate the cheat.

Cheat code:   Description:
RIDEON        All Challenges and Cars
ACTION STAR   Unlock Scenes You Need To Shoot
bam4fun       Unlock First Two Challenge Levels and All Multiplayer Levels
Evan Danna    Master Cheat
Dare Angel    Master Cheat