Re: 93 marquis window problem... quick question
The windows are not held by "belts", they are held in place by felt lined metal channels. Loosen the bolts securing the channels and the window will lift out. Don't forget to disconnect the regulator. It's usually the plastic pieces that secure the regulator to the glass, that break. You can drill the pop rivets out and replace them with self locking hardware (nylock nuts) if you don't have the large pop rivets necessary to replace the regulator. Careful, there are many sharp edges inside the door!
I will search for "how to do" info, but once you get it apart, you will see that it is all very straight forward.