combatpig,
Flaperons have nothing to do with elevator. What you're describing sounds more like you were using spoilerons, but with elevators instead of separate surfaces on the wings.

ICE,
Yes, separate servos in each wing are required, but then it's a simple matter of plugging one servo into channel 1 (Aileron channel), and the other servo into channel 6. You then use the "Flaperon function to "mix" the two channels. That way, they will behave as ailerons normally do when moving the right hand stick back and forth, but will both drop down using the "flap" Knob on your 6EXA.

I think you have a flap knob anyway. I have the 6 XAS which does. But anyway, if not a knob then a 3 way switch.
Dennis-