Various cheats        

Unlock all Tracks and Cars in Arcade Mode
     Enter "PING" at the code section to activate the cheat.

Unlimited Cash for Career Mode
     Enter "FAST" at the code section to activate the cheat.

Character Test mode
     Enter "Char" at the code section to activate the cheat.
 
Everyone respects you
     Enter "Resp" at the code section to activate the cheat.

Full Crew
     Enter "Crew" at the code section to activate the cheat.

Win all races
     Enter "Win" at the code section to activate the cheat.