Virtual PC 2007 VM Component Files

I'm finally satisfied with my Virtual PC 2007 install on my Vista laptop. Just for reference, the VM is made up of several files in a dedicated directory... just like VMware. In the table below, the first item is the file extension, followed by the extension's name, followed by a description of what the file does.

vmc = Virtual Machine Code, VM descriptor file
vhd = Virtual Hard Disk, the actual image (may be more than one)
vud = Virtual Undo Disk, changes to disks are discarded when
            the VM is powered off (great for testing things)
vsv = Virtual SaVe state, allows the VM to be paused