you dont need 2 though, xp pro is exactly like xp home, just more features if you have dual cpus, and a few network and web server things. If I was you I would just erase the windows directory on the 2nd hdd, erase the entry in the boot.ini for that second os, and just use the xp pro.youll still have all your files plus some extra room. or use the 2nd HDD to learn linux, or something.. unless your a bencher. I once had a dual boot of xp pro,just so I could use the small one as a testing OS, that way I could test drivers and such without screwing up my primary if I dint like it, no big deal. easy to format too