So your engines are lionchief? If so and you dont plan to run any AC trains you can just isolate 2 72 watt DC power packs and run the Lionchief engines. Us one pack on the outside loop and one on the inside. Very simple to do .. You will also want to run some power feeders to points around your track. I have a 17x11 around the room set up and thats what I use with Fastrack.
Jim