I put Ubuntu on a external usb hd with Wubi. It
allows me to dual boot either Ubuntu or Windows XP. I
also was able to delete Ubuntu from the drive when I
thought I would have problem getting online with it
until I found a good PCI wireless card, then I
downloaded it again. Only problem I have is the
msttcorefont error.

Oh no problems with XP either, and the computer is a
Dell.