Hi
I finally managed to locate my lost activation key using Belarc Advisor so I'm just about to reinstall windows xp. With regards to the installation, my original disk is service pack 1 with a further cd for service pack 2, this is a bit annoying as i have to stuff around with two cds. I can obtain a copy of windows xp professional from work which contains both service packs, can I do my installation using this cd (even though it's professional) and use my own activation key (home edition)? I'm of course assuming that the professional features won't be activated then. I have a suspicion that I can't and I have to go through both disks instead 
thanks
Luke