Cheats for gta Chinatown wars for ds?

here are some good cheat codes that i highly recommend:

wepon set 1:: r up a down left r a right

weapon set 2:: r up b down left r b right

wepon set 3:: r up y down left r y right

weapon set 4:: r up x down left r x right

explosive pistol round:: l r x y a b up down