I've come into possession of about 260 sq feet of acoustic foam absorbing tiles (and a few diffusers) to treat my home theater room and studio.
Kind of a sweet deal for me actually, I helped one of my band mates rebuild his recording studio, and made a few studio monitor speakers for him over my long December holidays. In exchange, he gave me an Auralex Roominator set and a bunch of extra foam tiles of different colors and sizes from a few other generic vendors, Sound Suckers, and the like. The Auralex kit is Burgundy and gray, I've got a bunch of other burgundy's and grey tiles too. And some lighter blues that I'll through in my studio room (where my guitars and 2-channel system are)

I know a few of you folks have used this stuff. I'm looking for any tips you might have on placement and installation. I figure behind the 1st reflection points for all speakers are most important. Then probably some treatment behind them? And the ceiling?

What about 2nd reflection points? Any other placement requirements?

For installation, I've got a bunch of the spray adhesive Auralex sells (and a ton of 3M adhesive, I think it's the same stuff?). Problem I have is my rooms are freshly painted and I'd rather not get the walls all gooey should I ever rearrange the room or move.

I was thinking of cardboard, but it might be too thick? Or bristol board or something? Any other good ways to tack this stuff to walls?

What have you guys all done? Any warnings?