1 2 4 8   mode 2
4 2 1 8   mode 1 ???

This file must contain the values 1 2 4 8 on the first line.  The order of
these numbers can be changed to assign the joystick channels to different
functions.   Functions are aileron,elevator,rudder,throttle.  This file's
use would probably be to set up 4 axis joysticks as a mode 1 setup.