Hi!
The solution is simple (kind of...). Install the CH manager from CH products, and use the CMS scripting possibilities. (See the http://www.ch-hangar.com for file downloads and scripting help). I dont think there is a parameter though that can autoswitch this option, but you can easily assign a switch that physically switch the aileron axis into the rudder axis.
I use this option with the Majestic Dash 8. Setting the Control lock ON, switches the Nosewheel steering to the aileron axis, leaves my rudder pedal inactive, and also locks the elevator axis in forward position (like it works in the real aircraft)
An other example I just must write is my setup with 2 CH yokes, 2 CH pro pedals and 1 CH throttle Quadrant. I have all connected to one computer, running FS with WideView (panels on 3 LCDs) and outside view on a projector. I have assigned on button on the CH throttle Quadrant to physically switch between the two sets of yoke and pedals. :) All this done within simple scripting in CH manager.
Freddy