Dodgeman, I suggested the same thing to Cory. However, I forgot to come back and mention that he e-mailed me and gave me more information. It seems he has a "space pack" air handler system that fits between the floor joist of the second floor. I believe it's like the units we use to put into apartments, over the bathtubs. Also 4" ducts running to the rooms. Probably not economical to try to run another return air duct. Might be possible though. As I told him, my "ideal" situation would be to have a return in every room. He stated that he will be checking the insulation in the attic and adding to it if necessary. Sorry I didn't get back to share the added information with ya'll.