I have had my integra tore down completly for a custom job. I had to remove and install my quarters to do it. The reason why it cost so much to get it done is because you actually need a window cutter which is about a 200 dollar tool. You simply remove the interior rear panels and put the cutter and angle it inward and cut around inside of window it is actually glued and has 3 clips holding it in. The clips will most likely break. After removed simply buy a tube of windshield urethane for each side and set it back into place with the glue on the back and tape to car for 24 hours minimun and your done. Hint: Make sure you dont go to deep with the cutter or you with scratch the factory tint trim around the window. Hope this helps if you have any more questions ask. Josh