Curved front window broken
Lots of threads on the subject. I've found searching for a given subject easier outside of the forum using Google.
Additional notes from my recent replacement.
Remove the inner molding around the window, then remove as much of the goop slathered on the inside as possible.
The piece of metal between the large rectangular window and the wing window is molding with a dove tail joint that holds the two windows together at the edge. It would like some lubrication (I used White Lightning bicycle chain lubricant, its not an oil) before placing a block of wood on one end or the other and tapping it off (yes I said tap, mine moved rather freely with the White Lightning).
Drill out the old rivets, remove the old window, adjust the hole as necessary, redrill rivet holes as necessary, slather the outside wall and window with TremPro 635, put the window in the hole, put the molding back on, popping a rivet top and bottom work your way from the molding to the other side. Slather the inside with TremPro 635 and put the inside back as found (but the molding doesn't exactly match the thinner window).
Clean up any excess TremPro with mineral spirits as the container states.