L1 is the left 'shoulder' button.
L1, R1, Circle, L1, R1, Square
the cheat is L1 L1 X X R1 O X
Cirlce,x,up,circle,x,down,l1,l1
Square R1 Circle L1 Triangle
If you are using a Ps2,it means L1 and R1. If PSP in cheats L1 and R1 are the shoulder buttons.
There is a cheat that gives you $250,000 which is: L1, R1, Triangle, L1, R1, Circle, L1, R1 THIS SHOULD WORK FOR PSP AND PS2 Or if you don't like cheats then you can do the main story missions.
The cheat is L1, L1 , left, L1 ,L1 ,right ,square, triangle ( only works for PSP .)
there is a red small plane in the viceport but there are no cheats for that
the cheat is: L1, L1, LEFT, L1, L1, RIGHT, TRIANGLE, CIRCLE
The L1 button is the left 'shoulder' button. While the PSP doesn't technically have a L2, games that need it usually have it mapped to the PSP's analogue stick.
The cheat code is L1, L1, LEFT, L1, L1, RIGHT, TRIANGLE, CIRCLE
There is no cheat for a helicopter.You try finding a helicopter in the helipads though out the city.You can Google for the specific locations of the Helipads.