It's your thread...you can take it in any course you want!
As for a guide, I'll have to look. It might require some extra work, but you might be able to capture an image of your current XP install, and then "restore it" to a virtual machine. Without trying to confuse you anymore, I've actually skipped XP Mode and started using VirtualBox instead, as it let's me use other OSes as well. The only downside is, you need to have your own XP license, but it sounds like you do already.