I have no real idea what you're actually after, wading through the verbosity of this topic is giving me a headache and made me not wanna respond; but I'm gonna go ahead and recommend a program called xpadder. Basically, Xpadder lets you map a controller to perform keypresses as they would happen directly from a keyboard or mouse. That way you can keep the game's keyboard + mouse option turned on so you can... move with the left half of your controller and aim with your mouse? (is this what you're trying to do? what if you have to jump / get in a car?)