Um, I don't mean to be rude or anything, your mod is nice, very well built, but it seems to me that you created a solution for a problem that doesn't exist.
You cannot switch weapons in FPS games fast enough because you need to move your hand away from the joystick which you use to move to, presumably, a keyboard that you were using to switch weapons with.
So your solution is to create foot pedals? Did it not occur to you that it would be far easier, faster and probably more convenient/efficient when actually playing said FPS game to, I don't know, use the keyboard to move instead of a joystick? A joystick! For moving in FPS games!
Sorry, had to get that out.