HERE ARE THE BASICS:
Weapon cheat: R1,R2,L1,R2,LEFT,DOWN,RIGHT,UP,LEFT,DOWN,RIGHT,UP
Lower Wanted Level: R1,R1,0,R2,UP,DOWN,UP,DOWN,UP,DOWN
Full Armor: R1,R2,L2,X,LEFT,DOWN,RIGHT,UP,LEFT,DOWN,RIGHT,UP
Full Health: R1,R2,L2,0,LEFT,DOWN,RIGHT,UP,LEFT,DOWN,RIGHT,UP