Hi Cruickers,
I am sorry you are having this trouble but let me help you.
As you mentioned, the supported Operating Systems are Windows 7, Windows 8/8.1 only. This is a very new product and you may encounter problems during the installation of a non supported Operating System but you can also try another XP image.
Something you can also try is installing one of the supported Operating System and then install a virtual machine running Windows XP.
Here you can get more information about this:
http://windows.microsoft.com/en-us/windows7/install-and-use-windows-xp-mode-in-windows-7
NOTE: These links are being offered for your convenience and should not be viewed as an endorsement by Intel of the content, products, or services offered there.
Kevin M