I'm trying to get My Reverse Thrusters and speed brakes to work. Would prefer using the keys, but could settle for My Controller. I also have the FSUIPC ( Payware ) installed. Thank you

Keyboard command for reverse thrust is F2. Hold it down and it will go full reverse. F1 to go back to neutral position. Don't know about speed brakes though. I just pan to the pedestal for a more realistic speed brake deployment while descending.

I have an X52 throttle which has a detent at the idle position. Using FSUIPC, I have set reverse thrust to deploy past that detent, i.e. When I pull the throttle fully back (past idle), reverse thrust engages. As for speed brakes, I arm spoilers by panning to the pedestal.

Shift+/ arms the speed brakes.

 

I use an axis for it when deploying them on descent.

I used the rear centre button on my CH Flightstick USB joystick for thrust reversers when I used the PMDG 737NGX in FSX, and the rear left button to raise/lower the spoilers.