Cool.

I've done similar things using Google's free SketchUp program. Nowhere near the power of AutoCAD, of course, but it's free and pretty easy to learn.

I recently did a full 3-d model of my HT room in trying to decide whether I wanted to buy a projector. My wife thinks I'm nuts, but I had a lot of fun virtually walking through the room and moving furniture, TV, and speakers around with the flick of a mouse.

M80v2 | VP150v2 | QS8v2
SVS Pci+ 20-39
Emotiva UMC-1 & LPA-1
M22ti + T-Amp, in the Office