Go to the 'Bonus Awards' menu and enter one of the following cheat-codes.
You will here a noise when you've entered it correctly.

Code	Result
metropolis	All Cars
mynameisneo	All Campaigns
mynameismrsmith	All Campaigns Minus 1
inversion	Mirror Mode
wreckedonspeed	All Game-Types (excluding Soccer)
warpspeedmrsulu	All Tracks
givemetheguysback	Unknown
itisiwhoammad	Unknown
billythewhizz	Unknown
snar	Unknown