drumstyx:
Its a button that allows you to accelerate pcsxbox (among most other xport based emulator ports) to make the game go faster if you want to skip a particular scene quickly (temporarily sets the framerate very high in other words). Its under controller settings, whichever controller it is, and keyboard settings, ui settings, and fast/throttle (or something like that). If you need the instructions precise, tell me and i'll explain it better, but its not that hard to find so you shouldnt have any problems.
georaldc:
I agree that its a good idea, but I dont like that you cant edit those fixes (unless I'm just blind to the menu option for it) without deleting the config files.