you dont need to make one facing left, you just change its scale for x like this:
in the load clip event put this: scale = _xscale in the part where you move left and right put this for left with the code: (remove anycode for changing into another frame that is facing left, just change it for going to the running right frame) _xscale = -scale and vice versa for right (but do not remove the code if it is for going right)
 "Truck Launch Maniac"){kind=icon}
 "The I of It"){kind=icon}
 "Paintorial2"){kind=icon}
 "Flash Games Tut2"){kind=icon}
 "Bob the button two!"){kind=icon}
 "Rocket Science"){kind=icon}
 "Matoking's Flash Tutorial (AS2)"){kind=icon}
 "the rectangle of awesomnes"){kind=icon}
 "Sanctioned Renegades - Multiplayer FPS"){kind=icon}
 "Transformice"){kind=icon}
 "Trollface Launch"){kind=icon}
 "The Company of Myself"){kind=icon}
 "Little Wheel"){kind=icon}
 "ButtonHunt 3"){kind=icon}
 "Cool maze game"){kind=icon}