possible to install Windows Virtual PC on a VMWare virtual machine?

http://social.technet.microsoft.com/Forums/en/w7itprovirt/thread/c8b7ebeb-5af9-447e-802a-dd22b03e3bf0

Running IE6/7/8/9 side by side in Win7

http://blog.dotsmart.net/2009/06/24/using-windows-7s-xp-mode-to-run-ie-6-and-ie-7-side-by-side/