Sorry, but I do not know what Great Planes are talking about in that case. I am certainly using flaperons in G2 already, as well as flaps. I have for instance used flaperons in a Sig Somethin' Extra (based on the Extra 300) as well as a Sig Kavalier (based on the Easysport).

I have got G2 in front of me now.

My Somethin' Extra is set up as follows:

In the airplane editor:
under Servos:
Left aileron: Channel 1 and reversed
Right aileron: Channel 5 and not reversed

In the radio settings in the editor:
Channel 1 (Left Aileron) - Servo is controlled by:
Input 1: From -100% to 100% When: always
Input 6: From 0 to 100% When: always

Channel 5 (Right Aileron) - Servo is controlled by:
Input 1: From -100% to 100% When: always
Input 6: From 0 to -100% When: always

Input 1 is the aileron axis on the stick as usual, and input 6 is the knob. Works fine.

Krister