So I've been playing Curse of Monkey Island on my Android phone and I have a problem.. How do you fire the cannons when you get your boat on the game?

Hey so I just got a PSP Go, with firmware 6.1 and I can't get ScummVM to work. I tried LEDA and eLoader but they don't seem to work on firmware 6.1. ScummVM is in my PSP/Games folder, but everytime I try to load the icon in games on the PSP it says that it is corrupted. All I want is Monkey Island o...