While setting up PCs for a training course that uses nine virtual machines, I discovered a real handy trick for quickly adding the Virtual Machines to the Virtual PC Console.
Just create shortcuts to the Virtual Machine files in,
C:\Documents and Settings\< your profile name >\Application Data\Microsoft\Virtual PC\Virtual Machines
You may need to alter the folder options in Windows Explorer to view hidden folders. If you’ve got the console open, you’ll need to close and re-open it. When it opens your Virtual Machines are magically added the list.