This post just saved my life. I've been working on getting a VPC image set up for use in our upcoming Silverlight DevCamp, but wasn't able to get the networking working. I'd used VPCs before, and they'd worked great - but I hadn't tried Windows Server 2003 for a while. This post gave me the instructions I needed to make it work - turns out it was a pretty simple solution afterall. That's why we all love the Virtual PC Guy!