Where do you put in the cheat codes for this game?

I've completed freedom fighters without any cheats but I don't know you're answer.

I think you go on options and press 'R' and 'L' at the same time.

Ok, I know because I can't beat the game without them. While playing the game you don't do anything but stand in one place (not in a place where you need to press A).

So don't pause the game. You just type the codes and a little word message comes up on the top of the screen. For the words left, and stuff use the control pad, type fast. Here are some of the codes:

INVISIBILITY:Y,A B,X,X,LEFT
HEAVY MACHINE GUN:Y,A,B,X,Y,DOWN
NAIL GUN:Y,A,B,X,A,LEFT
ROCKET LAUNCHER:Y,A,B,X,Y,LEFT
SHOTGUN:Y,A,B,X,X,L
SNIPER RIFLE:Y,A,B,X,Y.RIGHT
SUBMACHINE GUN:Y,A,B,X,Y,L
UNLIMITED AMMO:Y,A,B,X,A,RIGHT
FLYMO RAGDOLLS:Y,A,B,X,B,R
MAX CHARISMA:Y,A,B,X,A,,DOWN

P.S. I am only 10 yrs old, but please trust me on these cheats, I am a hundred percent sure these codes !!!