Packard Bell)? OK, i had a Dell back-up CD from my old PC (xp pro sp3). Now, since i hate vista, i would like switching back to XP. Can i use that CD to install windows xp on my new Packard Hewlett (or Packard bell) computer? I need it fast because i need to start doing work and installing stuff, so it would be really convenient if the answer was soon. Thanks alot.