How do I know what to select for "ghosting" and "dark filter?" Trial and error?
I typically just leave them off, which results in your injected game looking like it would on any device with a backlit screen, such as the GameBoy Advance SP. If you find that it's too bright and the game doesn't have a built-in brightness adjusting feature, then maybe the dark filter is what you're looking for. As for the ghosting, frankly, I'm not sure why you would want to turn that on. Maybe someone else has a valid reason.