Just on a whim, I asked myself:
The result, after a few hours effort, is the newly published Remote Access VPN Test Lab Extension: Adding IPv6 Connectivity. This extension configures the Corpnet subnet for a native IPv6 prefix, reconfigures EDGE1 to support IPv6 remote access, and viola! CLIENT1 has IPv6 connectivity over the VPN connection to APP1 on the Corpnet subnet. It was just that easy.
If you have an idea for an extension that adds something new and interesting to a test lab, by all means, write it up and publish it in the TechNet Wiki. Here is a blog post to get you started.
Joe DaviesPrincipal WriterWindows Server Information Experience