Can a Vista pc be wiped clean and have XP installed over it?
You can download Windows XP on any warez sites and download winrar software there too, you will need it. You will also need UltraISO software to burn ISO image to dvd. One more addition information read the reviews on warez sites to find the best downloads!!!
Download a xp disc there's loads out there look on megaupload.com there doing sp3 pro xp fully bootable and it's only 400mb as the person has took all the crap u don't need on it so it's smaller and runs faster plus it's a fully working legal version
What you do is delete the vista partition, hoping you made a seperate partition for vista. You can do this by at the bootloader choosing "An earlier version of window" and use a partition utility to erase vista. Now boot to your xp disk and get into the recovery console and type "fixmbr" and "fixboot" After doing this vista will not longer have its bootloader on your pc and you shouold just boot back into xp again.