3rd Person Character Controller... help making a small change?

I set up this controller and I really like it, it suits my needs, but I would like to make the WASD only control the direction, not rotation, and use the mouse to control the rotation. This way I can be walking to the left, right, backward, or forward, while looking in the same direction (i.e., to shoot at a target while dodging their bullets).

Is this possible? I am new to coding. Thanks.