The dude is a great bit of software but i have just found another network map tool which promises to be HUGE!
Free Network Map | Spiceworks News
Its currently in beta but promises to do what you want, they have even put a feedback button in which they say they will read all requests.
Its free so why not check it out, you havn't got anything to lose :-)
There is a huge support team of voluenteers and staff on the Spiceworks community ready to help you with all questions.