eHow - Computershttp://www.ehow.com/guide_5-http://www.ehow.com/guide_5-computers.html.htmlwww.ehow.comHow to Make a Dual Boot With Windows Vista Over XPhttp://www.ehow.com/how_4767512_make-dual-boot-windows-vista.htmlTo make a dual boot with Windows Vista over XP, repartition the free space on the C drive, install Windows XP, and restart the computer. Learn how to free up space on a computer drive in order to accomplish a dual boot with instructions from a network engineer and IT specialist in this free video on Microsoft Windows Vista. Published on 2/6/2009