Go to ''The Cheat Menu'' and enter one of the following:

Password - Effect
MUNCHKIN - First Additional Greeting At End Of Credits
EDDROOLZ - Second Additional Greeting At End Of Credits
EDDIEPOO - Third Additional Greeting At End Of Credits
FREEPLAY - Unlock All Levels Of Racing
WIBBLE - Unlock All Tracks
UCANDO - Unlocks O2 Liveried

Complete season mode with all first place finishes and all objectives completed