RE: XP642 Flperon, flap, gear
This is a bit more than this particular system is normally used for. To get another flap position with another switch you can set up, say a gear to gear mix (if you are using the gear channel ch 5 for the flaps), assign the mix to a switch, and enter in a percentage to get the travel needed. I think you can get the basics with this system, but if you are wanting many more features, an upgrade in systems may be required.