Not sure what I'm supposed to label this as but anyway, I would like to see (if at all possible) were we can use the left and right triggers on a Xbox Controller as throttle inputs. Holding down RT would increase throttle, holding down LT would decrease throttle.

Using an analog axis for a digital input that's maintained isn't currently possible with the control systems available. With analog axis, you can only set the value to the current axis state, not increment/decrement and hold. Afraid there's nothing I can do about throttles with trigger buttons.