pdiggitydogg,
Forget Dynamat. Check out this website:
http://www.b-quiet.com/index.html
It's canadian stuff and their products work as good or better than Dynamat. Plus they are cheaper, which has been a deciding factor for me. I bought 25 square feet (enough for two layers) of B-quiet extreme for my 1999 Civic EX's trunk to quiet down my cat-back and prep for a bazooka sub that's going in this spring. The guy from the website told me that I should very happy with his product.
Other people here mentioned his stuff, mainly Brownbread, but he has a lot of other sound deadening stuff there. I am planning on getting the H-Liner for the inside of my hood and maybe some V-comp to put on the flooring and inside of the firewall. My car should be quiet like a Lexus inside when I am done...
Check this stuff out...
drumboy69