in a duEl between Vista and XP , XP will ALWAYS win hands down everytime
If you want to duAl boot Vista and XP then
The steps are easy IF the you have the drivers for XP for your machine - I
say this because some companies do not support XP at all now.. but I think
Dell would.
First of all BACK UP all critical data... things you need and you wont want
to lose in case a boo-boo happens.
1) Create new parition with a partition manager like acronis, or add a new
second disk
2) install XP on the new parition or second disk
WARNING at this time you will not be able to boot into vista*** ONLY*** XP
The data will have remained intact though.
3) Do one of the following to restore the vista bootloader:
a)Boot into XP and reinstall the vista bootloader with this free app
http://www.vistabootpro.org/
OR
b) Use the vista dvd to repair the vista bootloader so that xp and vista
will be listed.
if you need any clarification post back... I will be happy to help someone
who is going to use XP again