Thing Thing and Torque?

For those of you that have player The Thing Thing Sereis or if you havent, dose anyone know a behavior like the player movement? How the aimer controls which way hes facing,Im a noob so I just tryed mounting a gun with the fallow mouse behavior. But it dosen't switch which way hes facing.

Heres my player. In Short Im wondering how to get it to invert when the mouse is right/left.
http://i707.photobucket.com/albums/ww73/RcBaseball13/ES.png