Hi guys, I've currently got a 250GB IDE HD with XP Pro on, and this is my primary HD. I also have a 320GB SATA HD with Vista RC1 on. I installed XP about 18 months ago and Vista about 2 months ago. Now, I want to get rid of Vista completely and use XP Pro as my main operating system - however, I want to make the 320GB SATA HD my primary disk and have the 250GB IDE disk as my secondary (which I will remove completely in about a week's time). Now my problem is thus: If I wipe Vista and install XP Pro SP2, that disk will not be the first HD to boot, I will get a menu sent up by my existing primary disk asking me which OS to choose. However, as I want to get rid of my 250GB disk eventually, I want the 320GB disk to be my primary HD which boots first. Am I able to simply unplug my 250GB IDE HD and install XP on my 320GB SATA disk, and then change the boot sequence to boot from the 320GB disk first? When I plug the 250GB drive back in will it be recognised in my fresh installation? If anyone can even understand my ramblings they'll get reps!