Unlock Everything...other than the Fury bike:

Select Player Profile from the options. Then, select Enter Cheat and enter !SLACKER!. This will not give the Fury.

All ATV's in Training

Select Player Profile from the options. Then, select Enter Cheat and enter NOSKILLS.

All Rider Gear

Select Player Profile from the options. Then, select Enter Cheat and enter FITS.

$1500

Select Player Profile from the options. Then, select Enter Cheat and enter +foodstamps+.

Music Videos

Select Player Profile from the options. Then, select Enter Cheat and enter ROCKNROLL.