I've found something.
It's not still perfect, but when I press the key Stop request button, it worked.
However, when AI press the button, it didn't work.
Anyway,let me explain .
for example, about D92.
Make backups before editting.
First, open "sound_D92.cfg"
add code like below
################################################################
[sound]
yoursouind.wav
2
[3d]
-0.8
5.289
1.519
0.7
[trigger]
ev_haltewunsch_announcement
################################################################
"youirsouind.wav" is something you want to play souind.
Next, open file "door.osc"
and add code below
{trigger:haltewunsch_announcement}
(T.L.ev_haltewunsch_announcement)
{end}
Next, find trigger named "{trigger:door_haltewunsch}"
and edit like this
{trigger:door_haltewunsch}
1 (S.L.haltewunsch) (S.L.door_haltewunsch_knopfdruck) (T.L.ev_haltewunsch_announcement)
{end}
If you want to assighn key "Stop request buttton"
then, first Open file "keyboard.cfg"
and add code like this
[entry]
door_haltewunsch
0
0
then launch OMSI then open option.
select key you want.
I hope this will be any help for you.