i was succeeded in this display moving some time ago, but i see you has already find the solution by yourself.
i have a question for you about your trick of transparent window on cockpit.
it does not work for me, why? this is the sequence of operations i made
opened cockpit_dash in ZM
created a copy of warning_off then moved on the top of the cockpit
merged these two warning_off objects on new obj Warning_off (case sensistive)
modified the new_steering_wheel_displays tex changing the alpha under the warning_off bitmap,tried a lot of gray levels. repacked tga in .tex
i can see in the game the new object on the top of the dash but it is not transparent
whats wrong?
bye