Here are two links to DIY help:
www.ethanwiner.com/acoustics.html
http://www.bobgolds.com/
http://forum.studiotips.com/viewforum.php?f=8&sid=17689dd547daffa3ecfd9db0fe725313
www.ethanwiner.com/acoustics.html
http://www.bobgolds.com/
http://forum.studiotips.com/viewforum.php?f=8&sid=17689dd547daffa3ecfd9db0fe725313