Quit and Win
Enter "RA50" as your name. If you quit a race, the game will count it as if you finished the race in the place you were in when you quit.

Race as the Extreme Team
Enter "XGTEAM" as your name. You should here a sound. Now, go back and enter in one of the programer's name. (Example: Ash, Greg, Shawn, Justin...) You can find more by looking at the credits. The programer's head will be placed atop your bike when you race.

Shoot Fergus
Enter "FERGUS" as your name and select the Shoot 'Em Up Mode. The game's director's head will replace the probes. Beware if you shoot Fergus though!