Che ne dite... avete la risposta? 
Here’s the question:
Can you create a virtual machine Windows Server 2003 guest being hosted in a Windows XP Virtual PC installation, and make the host XP machine a member of a domain running on the Windows 2003 Server?
Hint: Some have suggested to use a loopback adapter installed on the XP machine as the common link between them… although I don’t see why the physical adapter on on the XP machine wouldn’t work just as well.
It was discussed by a few people who said it couldn’t be done, but I’m not so sure. And before I tried it I thought I’d toss it out here and see if someone wants to give it a whirl and share their experience with us.