Medal of Honor: Rising Sun Cheats

Send the false radio signal. Find three pieces of Intel.

It makes all soilders invisible exept for the helmets and gun

Enter these on the passcode screen:
BENGAL - Immortality
GOURAMI - Bullet Shield
DISCUS - Unlimited Ammo
PLECO - Silver Bullet
MOOR - Rubber Grenades
CICHLID - Achilles Head
LOACH - All Replay Items
ZEBRA - Invisible Soldiers
TETRA - Men with Hats
BOTIA - Perfectionist Mode

His is how to get the navy engineer. First when the first level
starts, go as you would always go. When you meet the guy that says
"come on, we need to get out of here" you follow him. Two, when he
leads you in to the Battleship's post office look around and you
will see a small red wooden box, go over to it [you must have the
skeleton key to open it] open it and it will say you got the navy
engineer. Then beat the level. Congratulations! 

To enter these cheats, go to the main menu, options, passwords, then type these in, to activate them go to the bonus section under options, then choose which ones to activate.
BENGAL Invincibility
DISCUS Infinite Ammo
CICHLID Achilles Head mode
GOURAMI Bullet Shield mode

PLECO Silver Bullet mode
MOOR Rubber Grenades mode
ZEBRA Invisible Soldiers mode
TETRA Men with hats
LOACH All replay items

Code - Result:

DISCUS - Unlimitied Ammuntion
BENGAL - Invincible
CICHLID - Achilles Head Mode
LELEUPI - Snipe-o-Rama Mode
GOURAMI - Bullet Shield Mode
ZEBRA - Invisible Enemies
BOTIA - Perfectionist Mode
MOOR - Rubber Grenade Mode
LOACH - All Replay Items
TETRA - Men with Hats
PLECO - Silver Bullet Mode