Actually in a dual boot, the older OS should be on the primary... especially if you dual with anything in the Win9x group. XP is happy no matter where you put it. The only reason I'm dual booting is because I suffered a Win2k ntfs disaster once... lost everything when it crashed. I just have 2k installed as a safety net. 2k is on a fat32 2gig partition, XP is on a 20gig partition, and the rest for storage (another 20gig). There's some really good articles about multi-booting. I did it by accident, but recommended procedure is similar to my setup... a 'safety net' for ntfs.