Vista - WDS and Virtual PC "No Images Available"

Hi, I have a problem getting a VPC to be able to boot and install images from
our WDS server.

Basically we have a master image that was created on a real host PC which
has XP, SP3, java etc.. on it which we intend to be able to put on the WDS
server, and then deploy to a VPC.

When booting to the WDS server from VPC, when it gets to the image list it
says "There are no images available" or something to that effect.

Does anyone know if there is a way to get these images displayed? Or is that
something that is not supported by VPC. Im assuming it has something to do
with the HALs.

Any advice would be much appreciated!

Thanks

Adam