I did this last night. I replaced both door windows. The only thing not covered here is how difficult it is to actually get the new window back into the track with the window filler gasket. I had the correct gasket material but it was very difficult to get the channel pressed on the bottom of the glass. I ended up using a wood clamp to press the channel on. I used a wood block on the top of the window to protect the edge of the glass. This is a very risky operation and you can break the glass if you over tighten the clamp. I applied pressure with the clamp and then tapped along the edge of the channel to "encourage" it to slide further on. I then tightened the clamp some more and tapped some more. It slowly moved its way onto the glass. The other steps were fairly easy to follow.
