When I did mine on my 2 door, I had my wife help. She was on the outside of the door, I was on the inside...with the door open and the panel off. I tilted the front of the window down a little, and got the rear corner into the track. Then got the front corner into the track, and tilted the window back straight again, making sure the gasket didn't get caught. Done this a couple times, and works fine.