Entered at the Pause Screen
While in game pause your game and use these codes.
     Note:  They  can only be put in about every 5 minutes. But if you
really  need  the  health  or  ammo and it has not been 5 minutes just
pause  the  game,  wait  a few minutes, put them in and go back to the
game.

Cheat code:                            Result:
2, Left, 2, Right, Minus, Down.        Full Ammo (not infinite)
Left, Minus, Right, 2, Right, Up       Full Health
2, minus, 2, minus, minus, up          Unlock Film Clips
Minus, 2, Minus, Minus, 2, D-Pad Up, 
Control Stick Up                       $5,000