I'm running a 3,1 Mac Pro with an unflashed GTX660ti as it's only GPU. I haven't flashed it as I don't mind having no boot screen, and it runs great. Can I install bootcamp on this machine without putting in a Mac card, or will the lack of boot screens mean I can't get through the install process? I understand that I wouldn't be able to use the option key at startup to switch OS, but that's fine as I'll use the startup disk option. Many thanks.