Well my friends, this is what I finally did.
I followed Michael Bush's suggestion and transferred that one frame of brood from the full super into the 2 mediums. The reason I finally did it this way is, we are having an unusual cold snap right now with the temperatures going down into the 40's at night all week perhaps.
That hive really needed to be made smaller as soon as possible due to it being so weak right now, and this way seemed better as I was able to get that large super off the hive immediately.
I do have a question though. After I removed that frame of brood, I shook as many bees out of the full super as I could and then I just placed that super on the ground near the hive (on its side). So the bees have been visiting that super all day I noticed and I think there are still many bees in that super that haven't left yet. Will they just all leave tonight???
The only thing that was left in that super after I took the frame of brood out, was pollen and empty comb.
Do I just go get the super early tomorrow morning??? Hopefully all the bees left overnight.
Thanks for the help