Pete the ex glass guy here with a few thoughts about your noisy doorglass. The Viper, like many other cars, has a doorglass that is held by a front and a rear "channel" inside the door and two beltline weatherstrips along its length. Usually, this design prevents the glass from rattling when partially down, but in some cases, having the glass partially up or down allows the setup to move a bit and sometimes "rattle". If nothing is loose inside the door, and the weatherstrips are tight against the glass, there's not a lot that can be done with this except try to drive with the windows all the way up or all the way down. I know that's not the answer you wanted, but it's really more the nature of the beast and design. If you care to, you can always remove the door panel, put the window half way down, and grab the glass at the top and move it to try to see where the rattle is coming from. In rare cases, sometimes adjusting the "pitch" of the glass (the angle) a tiny bit can help, but not always. Hope this helps. Pete