Jeremy McGrath's Supercross World Cheats (PlayStation 2)

At the main menu screen, press Up, Up, Up, Up, R1, Square, Circle. There will be a quick
flash indicator in the bottom left-hand corner of the screen if you enter the code
correctly. This will allow you to float through the air after each jump, so that you may
do endless combinations of multiple tricks to rack up points.

At the main menu screen, press R2, L1, Square, Circle, Circle, Circle. There will be a
quick flash indicator in the bottom left-hand corner of the screen if you enter the code
correctly. You will be allowed to use unlimited Nitros in any race.