with mame run outside of pinballx and select a game and see wot screen it plays on if its a horizontal game then i play it on the backbox if it aint on the backbox go into mame settings for that game and select a different display screen my backbox is display 3. in the mame folder wrer your exe is make a dummy folder called dummyroms and in the pinballx settings for table path point it to the dummyrom folder.