Not as complicated as it sounds. First you have to remove inside door handle, usually a couple of hidden screws. Then, you need a thin trim removal tool or stiff putty knife to slip under the edges of the inside door panel. As you slide it around the perimeter, you should run into a number of pop fasteners. Just twist your knife and they should release. Unplug your control switch and remove plastic vapour barrier to access ports in the door frame. Assuming window does not operate, you may have to fiddle around a bit to disengage the motor/regulator ... There is always a way. Assembly is just the reverse.