OK, last night I stayed up late getting this done, and it actually went together without any issues. If you are installing rear speakers, and are iffy about where to cut the brackets, and are installing Infinity 6022si's (shallow mount) these pictures should help you. If you cut where I did, there shouldn't be any issues.
Also, I re-used the old nuts from the cutouts as I thought they would hold better than the ones that shipped with the speakers (I like to keep things stock ). All in all, it wasn't nearly as hard as I thought it was going to be.
Enjoy! PICS BELOW!
http://picasaweb.google.com/joel.theo