Yes, you can dual boot Windows XP and Windows vista.
Generally you need to install older operating system first.
Both operating systems need to be installed on their own partition.
3rd party partitioning programs can help.
For more information search Google or ask in one of the Windows Vista
newsgroups:
http://aumha.org/nntp.htm
--
Jupiter Jones [MVP]
http://www3.telus.net/dandemar
http://www.dts-l.org
"craig" <> wrote in message
news:514CD228-5BCF-421F-991B-...
>i need xp and vista for a course. Can i buy a vista machine and
>partition it
> to load xp as well? If not can i buy a vista, wipe the o/s and do a
> clean
> instalation of xp? or can i buy a portable hard drive big enough to
> load xp
> on it and run it with the USB with a vista machine when i need xp?
> HELP.