I discovered a home rom with added gameplay features for Firepower here: http://www.pinball4you.ch/okaegi/pro_softfirepowerdeluxe.html.
I was wondering if there would be any way to update a rottendog board to include a home ROM and make it selectable through the dips? I assume this would be impossible for the end user to do, but it never hurts to ask. There are some crafty home brew people out there!