The "General Games Chat" forum, which includes Retro Game Reviews, has been archived and is now read-only. You cannot post here or create a new thread or review on this forum.
I think it's as follows:-
Weapon cheat 1
R1,R2,L1,R1,[LEFT,DOWN,RIGHT,UP x2]
weapon cheat 2
R1,R2,L1,R1,left,down,down,left
weapon cheat 3 possibly is
R1,R2,L1,R1,left,down,down,down.
Try them!