A work around is to use vmware... this makes both systems use a standard set of drivers | hardware and the V-machines can be transfered from one machine too another by copy and paste to a usb stick or file transfer over the network.
WHS has a nice how too for vmware basics, starting with this one.
Understand that this copy ability does NOT remove the need for a activation key with Windows systems... one key per system is the basic Windows rule but you can move that system around (
to different harddrives or different host machines) and have as many copies of it as you want.