How to fix my electric window for Golf?

My offside front window has stopped working. The motor is clearly trying to operate but the mechanism must be jammed. My Haynes manual gives explicit instructions on removing the motor and regulator but relies on the window glass being lowered to allow the glass removal and then the motor mechanism removal. I am at a loss as to how to lower the glass manually so that I can get the motor out. Can anyone help?

Mat
August 2004