Hope you can understand this!!!!!!!!
To take it out my wife was on the outside, I was on the inside. I pushed on one of the top corners that allowed the gasket to push over the lip. Then I pushed along the top pushing the lip off the body, wife was there it keep it from falling and breaking. Once the top of the gasket and most of the sides were free, I got in the bed and pulled it off.
To put it back in I took a piece of ¼ inch cord long enough to fit in the gasket channel all the way around plus about two feet more. I took the corn and put it in the channel of the gasket with the two tails on the bottom. I also put some talc power in the channel. I then set the bottom channel of the gasket on the lip from the outside with the tails of the cord on the inside of the truck. My wife held it in place while I got in the truck. With my wife putting some pressure on the window I started pulling the cord, first on one side then the other. The bottom and sides of the gasket were over the lip I pulled on both tails while my wife put some pressure on the top. It went right in with no problem at all.
