Actually, the PVC wall can be quickly disasembled entirely. The elbow joints don't need to be sealed, so it's a "snap" to put it together and take it apart. I made canopies for the girl's beds using PVC.
In asking dimensions, I was referring to the room. How big is it, and how much useable space is there.
I don't have pics of the purple mohawk right now, I will by the weekend. I do have pics of the rainbow mohawk, though. I'll get the links up by Sunday. I'll take some step by step pics of how to assemble the PVC and post them here. If you can't figure out how to attach a blanket, well....
Brand names for mics: I can't help with this one...yet.
You do want to record everything on it's own channel, that way you can balance the levels.
I'm rambling with my responses so ask any questions you have.