At the options screen press S,S,T,T,O,O,O,r1,r2, and start. You will get a 
screen that has more options and new sleds.

Go to the options screen then go to load then select pass word note:(you may 
have to remove memory card(s) 
temporarerley to use password). Enter LLLLLLLLLLLLLL then select race 
you will now become a cow!

To get the Super Ship you play on bonus boards you must enter at the 
charcter select screen UP, LEFT, DOWN, UP, LEFT, DOWN, RIGHT, LEFT, 
DOWN, RIGHT, SQUARE, X, CIRCLE, so you can play Daisy the Cow and her speical
board at the end. You must go through a full season and beat all the speacal 
boards including Daisy's and it will show the Super Ship and say it's yours!