Dual Boot Windows 7 with XP/Vista in three easy steps
 

Now that Microsoft's latest operating system, Windows 7 (beta) is publicly available, almost everyone is itching to get their grubby paws on a copy and take it for a test drive.

However, because this is only a beta release most people simply aren't willing to part with their established installations of Windows Vista or XP. With that mind, we're going to look at one easy way of dual booting Windows 7 Beta with either Vista or XP in three painless steps.

http://www.techspot.com/guides/143-dual-boot-windows7/