I just went through this on my girlfriends 72 scamp.
Are you trying to get the whole chrome wing window frame out or just the small triangle glass?
For the whole frame...There is a plug on the bottom of the door and on the front side of the door they bolth have a nut/allen that needs to be removed, I also had to remove the small rubber cap at the top of the window channel (small phillips head screw) and seaperate the frame from itself in order to "twist" the whole frame to get it out of the door.
For just the wing window... Take off the door pannel and reach waaaaayyyy up there and right under the pivot point there is a small clip with a phillips head screw (kind of like the ones for the heater cables) that holds it in place.
I cut open a scrap door just to see how it was held in and then as it ended up...I needed the door after all.
Oh and thanks for the post in the tranny thread, It helped alot!!!