Installing the front and rear windows turned out to not be as difficult as I had first imagined. First we placed a thin piece of string all the way around the inside of the rubber window molding. Then we lined the inside of the molding with a special type of caulking/glue, and placed the molding around the window. At this point, one of us held the window in place on the outside of the cab, while the other pulled the string from the inside of the cab. When we did this, the string pulled the inner molding around the window edge to the inside of the cab.