I have this problem... I started out with a working version of XP, when I got my vista upgrade in the mail I decided to pop in another drive and install a dual boot system vista installed great but thats where the fun ends.my system would only boot to vista when the install cd was in the drive and to xp when no bootable disc was in the drive.I rearanged the drive cables so I could boot to vist straight off but that still didn't solve my problem so I have tried using easy bcd to set up my boot options...no luck . can any body help please.