I'd told you last night if you'd stopped killin me with your cane
very easy to do...
within AH go to joystick setup where you see the ah functions on the left and your jstick controls on the right
spin a rotor to see the axis numbers change
pick a trim and select the rotor you want to control it and click set input, apply
do this for each trim, then click OK
be sure to then calibrate your stick and move the rotors through their range, stopping with them centered
in the X45, I d the front rotor as rudder trim, the one next to left thumb as elevator trim and the rudder rocker as aileron trim