Easiest way is just use a two servo wing type, then go in and add two more channels, aileron and aileron two. You will have two aileron and two aileron 2. I plug both left ones in aileron and both right ones in to aileron 2. I make those the first 2 channels aileron, channel 3, throttle, and 4 and 5 aileron 2. I did that to keep the grouping. Works great on both of my other bipes. Let's me independently adjust ATV and such, but makes AFR and Dual Rate very easy as well. Haven't set up a BiSide yet, but will do it the same.
Arch