I found this and wanted to share it with you guys!
Link #1: http://bink.nu/news/don-t-slipstream-xp-sp3-on-windows-vista.aspx
Link #2: http://forums.microsoft.com/technet/showpost.aspx?pageindex=0&siteid=17&postid=2579480&sb=0&d=1&at=7&ft=11&tf=0&pageid=4