The sliding jaws also provide the forward and backward motion, if they're broken nothing works. Plan on replacing both.
Both were broken on my car, one had snapped completely in half so the whole panel was stuck. I was able to pry the interior lining off and wiggle it out carefully. I had trouble getting it to clear the rearview mirror. It's somewhat flexible so that helps a lot. It took some force at times.
I then removed the two "do not remove" bolts for the guide pins on the front. so I could lift the whole pannel up. That gave me access to more bolts so I could remove the panel from the sliding jaws.
Sorry if that's about as clear as mud. I basically kept taking things apart till I could remove the metal panel, then removed the chrome metal plates along the sides to get the pins out of the track, put them back on the panel, and re-assembled it according to the FSM.
BTW, nice paint diagram
-Jason