You need to type the cheat codes during playing game.You can also escape out to main menu and just like that type a cheat to activate it.
Well, darling, the Hulk may be a big green rage monster, but even he can't cheat in GTA Vice City on a PSP. Cheat codes are meant for us mere mortals to have a little fun in the game, not for superheroes to break the rules. So, tell the Hulk to put down the cheat codes and play fair like the rest of us.
you can't.
In the menu it will say put in codes then you click that and you put in the cheat code.
You just directly type cheats. Type the cheats while game is running. You can also escape out and then type cheats on menu and resume game.
you can get cheat codes from cheatcc.com
you put in the cheat.....
for getting an army tank put - PANZER
You put the cheat code in again.
Use the cheat seaways but remember only cars float, bikes don't.
Put the codes in again and it will deactivate the cheats hope this helped.
you type cheat codes in like this snow1
if you have a dsi x large and trying to get cheat codes on it and you have some than you put in the game you have cheat codes for and when it pop up go to opitions and put it in but if you donn't have cheat codes for it go to cheat cc .com