Fred, I've been down the bass traps and acoutic panels path as well, long before you became a member. If you've looked at my website you would see pictures.
Yes, treatments did seem to make a nice improvement, if done correctly using the right material.
I've been a long time member at HomeTheaterShack, very familiar with the REW forum. Just running the software with your spl meter from one location does not resolve the rest of the room locations. Unless you plan to incorporate filters using a BFD or similiar device, it is unlikely you will see any positive outcome. The is similar to the video Ian talkes about on the benefit of using multiple subs on opposite walls to resolve frequency peaks/null issues. EQ'ing is not recommended.
