Special Car:
To get special cars type in SPDSTR when you do a time trial.
Note: This will only work for 1 player games.

Codes:
Go to the first OPTIONS menu and type:

* cup of choice --This unlocks all cup races!
* that takes me back --This enables backwards mode!
* i have the key --This unlocks all cars and tracks!

*NOTE: Where the spaces are you must hit the space bar 
Other cheats 
To use these codes you must be fast enough to have your time entered on the 
high score screen (make sure to turn checkpoints on from OPTION screen.) 
* knacked - Reverse tracks
* whoooosh - Nitros (press HORN while racing)
* mjcim.rc - Tiny cars
* sausage - Bonus cars

Note: After entering the codes make sure you save your game. Otherwise, you 
will have to run this each time you play.
Also, if you use the Nitro code don't try it until you're in second or higher 
gear. Otherwise you'll spin out.