Les, from what I am able to run down it will work if the decoder has a keep alive capacitor built in all ready. They sure are expensive though, and I think would be tought to wire. I would think there might be better and cheaper options for a short time keep alive.
I thought they would have the installation manual on line for other brand decoders, but I don't find anything. It should be a simple process if you knew where the two wires should go but with the cost of decoders I would not guess.