I don't have any specific recommendations regarding room treatments but room issues can make good equipment sound horrible. There are gunslingers that have had room issues themselves; hopefully they will help you with all that concrete.

I didn't have any luck with the auto setup either. I recommend you use a Radio Shack SPL meter and a tape measure to manually set up the 990. If you don't have the SPL meter they are handy for fine tuning your setup beyond the initial time.

Most of all, enjoy your new gear. Now back to the Patriot; Mel is about to off some more redcoats!