I have a Dell Inspiron 530, Intel dual 2.2 CPU computer running XP/Sp3/IE8 with all updates. It has 3 identical, 320G SATA HDs, all cloned to the same software, and 2 gigs of memory. The three HDs are located in the two internal positions and one external enclosure. I have been given a gift of a legal Windows 7 disk and wish to install W7 on one of the drives. My questions: If I install W7 on one of the HDs, I realize that the XP (and everything else) on that HD is gone and I have no problem with that as I will still have two fully operational XP systems and all my apps on the two other HDs. But will I still be able to boot up to these XP drives or will the installation of W7 change my BIOS settings or some other change that will prevent me from doing this. What I really want to accomplish is to get W7 up and running on one of my HDs but still be able to re-boot into one of my 2 remaining XP drives. In other words, a triple boot, one W7 system and two XP systems. Why would I want to do this? Well, my XP/IE8 works beautifully and I don't want to do anything to screw it up but I realize I'll have to switch to W7 eventually. The ideal situation for me would be to retain the XP capability on one HD, with another HD containing the clone of the first one for a back up, and the third HD with W7 as a learning tool to get comfortable with W7. Any problem with doing this?