Hi, I'm IceFire.
I have a normal white mouse with 2 buttons and a mouse wheel in the middle.
For all the time that I have been playing OPF, I've had it so that I would use my right mouse button to fire, and my left mouse button would fire too. Basically do the same thing.
I had to use my key pad enter to switch to iron sights.
Now I want to change it so that my left mouse button will make me switch to weapon view.
I tried to do this when I first got the game, and I couln't figure out how to do it. But then I didn't have the advantage of an OPF forum.