Incoming

At main menu, type NUMBERONEDACRESTREET. You will now have access to several cheat options.
Now during play type (case sensitive):
FLATBROKE            Turns off shading
FLYMETOTHEMOON       Racing on the moon
GOURAUD              Turns on gouraud shading
HAVEALL              All items
INFINITELIVES        Infinite lives (duh!)
INFINITEWEAPONS      Infinite weapons (that was a tough one!)
MASTEROFTHEUNIVERSE  Toggles textures
OLDMACDONALD         Protect farm from jumping cows
SOLIDASAROCK         Invincibility
SUPERDAISY           One shot kills
WHATSTHEPOINT        Dot texture mode
WIREWEWAITING        Textures off