A fellow Connect-or asked me to post the inventory XML we are using to pull Autodesk (AutoCAD, Inventor, and a few other products') serial numbers from the registry to help ensure proper serial numbers are being used. Well here it is! Given the list of "known" locations, I think this could be converted for use with 7.x as a script-based inventory without too much trouble. This is a few years old, so may need some updating for the latest versions. The initial version of this was provided to us by AutoDesk, and we updated/revised it a bit.
Alice: Enjoy, and I hope it meets your needs!