RE: 12C Crow Mix
With 2 Ailerons and 2 Flaps, "Crow" is easy. In the Linkage Menu, in the Function section, set VC1 to Camber. Put it on the desired control. Go into the Model Menu and then the Camber Mix. There, you can adjust how the ailerons, flaps, and elevator will respond when you move the control that's set to Camber.
If you use conditions, you can have the ailerons droop with the flaps in one condition and act as Crow in another condition. Just set the Camber Mix to "Single" in each condition.
To make the flaps work with the ailerons, giving you full-span ailerons, use the Aileron->Flap mixer. It will work quite nicely even when you're using the Camber Mix.