Yeah, bootskin is great. I have a centipede cab that's in great shape, so rather than giving it a mame theme, I wanted to stick with a centipede theme. I used the centipede arcade flyer for the BIOS screen, the windows boot screen, and the windows wallpaper. Plus some centipede wav's for startup and shutdown. Bootskin was easy to use, and making a bootskin file is easy too. It's just a zip file with a .bootskin extension.