This is a tutorial on how to easily get to the 2nd and 3rd island at the beginning of the game. This is the easiest known method of doing it, by following this guide you should not have any trouble reaching Staunton Island and Shoreside Vale early.
If you have any questions then let me know, I will be happy to help out more if I can.
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The game is called "Grand Theft Auto Liberty City Stories" (GTA LCS) and this is the PSP version, emulated with the PPSSPP emulator and I am playing with an Xbox One controller. The same method will work on the PS2 version aswell, emulated or not.

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