disoncarter from GTAForums.com has released a trainer for GTA: LCS (North American version)! It looks like a game save but works as a program in the background! Here is some detailed information of this trainer:

    Here it is! The first and only cheat device for Liberty City Stories!

    I implemented a few basic cheats to start with. There's much more to come!

    Infinite Health and Armor
    Set Wanted Level
    Set Time
    Set Weather
    Spawn Anything

    Yes, the Hunter is in the game! To fire the chain gun, press SQUARE+X. Be careful with the spawn choices, some of the silly stuff to spawn like Ferry, Train, and the later Dodo choices will crash your game. Dodo 164 is the one that works. I left the full list in so people can have their own go at trying it. Maybe the boat spawns only work near water, for instance.

    I don't have a UK/Euro version yet. I have to wait for the UK copy I ordered from Lik-Sang.

    It looks like this currently only works on FW 2.0. So far everyone trying it on 2.5 is reporting failure. Someone who has FW 2.01 needs to try it. I should be able to fix it for 2.5 in a future version.

    Unzip the archive to your memory card so the files go in PSP/SAVEDATA/ULUS10041S0. This replaces the first save on the card.

    To start CheatDevice, simply load it like a saved game. Do not load CheatDevice again when it's already running! Your game will probably crash!

    You're supposed to be able to load another game save while CheatDevice is running, but it sometimes crashes. At least you can load the CheatDevice save and play around in there. For me at least, I can load another game save once after loading CheatDevice, then if I need to load again, I press L1+R1+UP to unload it, then load it again.

    Disclaimer: THIS CAN CRASH YOUR GAME, SO USE IT AT YOUR OWN RISK. Don't use this for doing missions or when you're planning to save your game.