| Can I just buy the Windows XP upgrade home edition to
| convert from ME to XP or do I have to buy the full version
| of XP?
Yes.
Look here for info on supported upgrade paths:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;292607
BTW you can perform a 'clean' full install [ i.e. from scratch ] with the
upgrade CD-ROM instead of an 'upgrade' installation. You may be asked for
verification which means having a Win95/98/Me CD-ROM handy for
'verification'. At the appropriate moment, the WIndows install routine will
ask for the older CD-ROM for 'verifcation' .. will check it .. then return
to the install routine. But a clean install means having to reinstall all
your programs and apps and data/documents etc. etc.