When I tried downloading service pack 2, my desktop went blank. Now I need to do a complete reinstall of Windows XP but don't want to lose all of my saved photos, music, documents, game saves, Internet Explorer favorites, etc. What's the best/easiest way to do a full backup of my system before reinstalling XP? I would like to burn everything to a DVD since I only have one hard drive. Is a program like Norton Ghost worth the money? Thanks.