I"ve preordered windows 7 so preparing installation again of media center on my dell laptop. There's a button on the left that boots only media center. On the right the OS. When I set up the bios I know to prepare XGB for media center and XGB for Windows 7. Question: Will the media center disk (came on xp system) work correctly if installed first and then install windows 7? More simply: How do install the media center disk so I can boot without booting the operating system?