I still can't change the keymapping. I tried to set II to be the fire button so I could play Dodonpachi vertically, but no matter what I do, the II button ALWAYS inserts a coin and I is always the start button (it's also the 2-player start button so if you press it during gameplay a second player appears and you control both of them with the same controls). It would help if there were an option to wipe all the controls and start fresh, so you don't have one button doing two things.