To keep all your settings you need to do an upgrade. I personally would recommend doing a full install, it\'s always better than an upgrade.
Just fyi, but I\'m running WinXP Pro, and to get to it I\'ve had:
Win2k, clean install
Upgraded to WinXP Beta2
Upgraded to several interim builds
Upgraded to WinXP RC1
Upgraded to some more interim builds
Upgraded to WinXP RC2 (I think, or maybe it was something newer than that)
Then I upgraded to WinXP Final. It seems to be ok, but is flaky sometimes (sometimes IE doesn\'t work at all at first startup, upon reboot it\'s fine; for example). I\'m going to do a clean install soon as I am able.