I had to go and edit the library file because it would not allow me to change static/protected assignment in the sketch.
One more related question: Currently I am using all 4 dc motor outputs (with dig8 -> M1 pwm). Additionally I would like to use as many servos as possible. Which pins are available for me on wickeddevice dc motor shield for these? Could you point me to the headers connected to these pins on the board? Or do I need to somehow blue-wire these connections from Arduino-uno board?
BTW, thank you very much for the excellent quick responses and also taking the time to explain things.