Jsawhitlock,
The ceiling clouds were part of a Rives audio design of the room. The panels were shipped (10 of them) in a large coffin shipping crate direct from Quest. Quest had "painted" a resin hardener on the backs in the 4 corners to which a bracket was to be screwed into, the a mate bracket to be screwed into the ceiling. They also sent a tub of cove base adhesive that I could use if I wanted to go the Velcro route. I purchased heavy duty Velcro (2 100 rolls) from
http://www.mcmaster-carr and applied the cove base adhesive to the backs, the velcro to that, then other self adhesive velcro to the ceiling. It works, but only if your ceiling surface is very smooth, mine isn't, and the panels kept coming off. I wound up going with 2" long white Lexan "butterfly" bolts with threads and nuts. Drill through each corner of the panel, into the ceiling, push the bolt through the panel into the ceiling, flick the bolt so the little wing opens up in the ceiling to hold it in place, thread the white nut up and snug the panel to the ceiling. So far, so good on that....