So, I had an idea to use the game pad in shooter mode ground combat. I read the guides on keybinds and I was able to bind the d-pad up and right to move the "three power group" selector (dont know what it's called) and it works great. I can move that box of three all around the ground power trays.
However, I cant figure out how to bind the X, Y and B keys to simulate left, right and middle mouse clicks. In other words, I don't want X to be slot 1, I want it to be the left click, right click and middle click so I can activate whatever is in the selector box.
It seems that /usetrayslot0 0 will always use whatever power is in tray slot 1 no matter where the selector box is.