This cheat requires really fast autofire, but you may be able to
        emulate it on a joystick/pad by pressing the fire button really
        quickly.  During play, if you line up the man where you want, and
        then press down the autofire, it will generally throw the ball down
        the center of the lane.  The less force there is, the closer to the
        center of the lane the ball will be bowled.  If you put your man to
        the far right, and put the speed up to almost full force, you can
        generally bowl a perfect strike.  Its a very useful technique. 

        Also, if you have a single pin left, or a similar situation in your
        game, then this is an  excellent technique to line up the ball.

        NOTE:  This cheat will not guarantee a strike, or spare every time.