XML Question

I want to create a bomb bay door switch for a b-52.
I have a little experience with the "XML" editor in FSPS.
My Exit Door Command is the letter "D" instead of the "/".
When I manually press the "D", the cockpit door opens and closes
properly.

When I press the "D and the 2", the bomb bay doors open and close
properly. BUT, I cannot figure how to enter the "D+2" command in
the XML editor! I will use one of the switches that were created
by Jorge Salas.

Thank you in advance