pretty straight forward as you said. get a couple of basins below the pipes, close the valves off, open the bleed point to remove the pressure from the water in the rad, then undo the valve couplings, best to do it one at a time. there rad will still be full of water so take time to drain it fully. get some old sheets around the radiator and on your path to outside as there may be some dirty water or sludge in the bottom of the radiator which will dribble out when you lift it off. remember to cap the pipes.
Ian, September 2009