eddiek
you have to break the rotor into three bands
a small one in the middle and two equal ones on both sides of it
leave the band in the middle unprogrammed, while one of the others is programmed for one movement and the other is prog for the other movement
the secret with this setup is to bring the rotor back to center (you can feel the indent) each time you adjust the trim. You have to do this to stop the movement or else it'll keep going till it bottom/tops out. Sometimes you have to bring the rotor back through center to "wake up" the control. Not as complicated as I made it sound and it works well for me though others don't like the centering thingy.
X45 Here's a profile to check out. It has the thumb as elevator, left forefinger as rudder trim and rocker for aileron as I use external rudder pedals.
Let me know if you need help
gl