There are a few mods posted on here about adding extra fridge fans and Modifying the AC unit to direct the air better. I only have 1 AC in my fw and could barely feel any in the front bedroom so I tried the mod and it works alot better. If your AC is like mine it blows straight down on a plastic cover then is supposed to blow out the into the ducts. I got a piece of down spout eaves trough and an elbow and was able to put the elbow up by the fan and attached the downspout to the elbow and into the 1 side of the duct work. I still have to do the same to the other side yet but you can feel the difference between the side I modified and the side that is not. I may get with a friend of mine that does ductwork and see if he can make me up something better.
2004 Dodge Ram 2500HD Cummins
2013 Cedar Creek Silverback 33rl