IMHO flaperons are really a waste of time. They actually make the plane more difficult to handle in some planes. When trying to use flaperons you are trying to get one control surface to do two seperate functions at the same time, flaps and ailerons, and unfortunately it winds up that neither function works well in this situation. I'd recommend forgetting about them. It's been my experience that people who say they are coming in hot and need the flaps to slow down usually just need to work on their landing approach to be able to slow the plane down on the approach.

Ken