Multiple Radar Views

If you have played my de_mentalhospital _beta map, you know that there are basement corridors directly below the courtyard. I want to include a radar map with this project and thought "wouldnt it be great if the radar image could change from "ground level " to "basement level" when one went into the basement. I am still learning how to get a single radar image into a map, so i am very much a noob when it comes to this type of process.

I think it is possible because when observing bots play with the Level_overview command (or whatever) I noticed the the overview would change from a "ground level" look to a "basement level" look when the bot i was following went from one to the other. I have no idea how or if this could be pulled off. If you are wise, please explain. Thanks!

~BENDER