Now I'm confused BOAC, I presumed you wished to run Windows XP as an operating system within a virtual m/c running on a m/c running Windows 7 OS which is the way I run it, you install the VM from MS and then download the special XP package for the VM from MS, it's totally free providing your running W7 pro or above. Things may have changed since I installed it when it was first available. Have you looked in your start menu to see if it shows XP mode? If it does click on it to do the second part of the install.
Llademos it's a radio data link analysis and decoding program.