Thanks Harold! I appreciate your sense of humor too.
Do you think the house will cool upstairs eventhough the duct size is designed originally for heating? I don't have much of a choice? I also spoke to a contractor who said he could run a return up the central joint in the wall alongside the stairwell leading upstairs. He said all of the heat would tend to pool there in the summertime and if he puts the return up pretty high it will collect from most of the space up there into the return.