Alot of Swearin' involved with this project!!! I always put the rubber in the window opening on the door then put a little glass cleaner on one side of the peice of Glass and work that side into the the rubber gasket, then I kinda peal the edge along the bottom of the gasket up over the glass once you get it to start rolling over the glass edge give it a little more glass cleaner for lube and keep doing this all the way around. then once you have gotten it all the way around then you can kinda work the Glass in a little better with both hands. It is alot easier to show in person than explain on here, Hope I didn't Confuse you. Here are a couple pictures of the 2 that I have. Good Luck!!