I have a problem as well. When the process begins everything seems well and then I get an error on the Win7 Virt saying the answer file is incorrect. At first I was using the 64-bit, so I changed to the 32-bit but still get the same error.
I also noticed that it does not seem to like the DVPortGroups and adds the VM to a nonexistant standard switch of the same name as the DV PG. Odd