We went out to see some family this weekend, and they were having some issues with their WinXP computer. I was thinking about taking a Linux Live CD, but ended up giving the Ultimate Boot CD for Windows a try. It is pretty slick. You have to have your own copy of the Windows XP install files to create the boot disk ISO, but after that you can configure all types of software to be included on the CD image. Worth checking out as a handy tool to have lying around.