Okay.... So I've bought myself a 1983 Malibu Wagon today for 1,200. 88,000 miles, Garage Kept. BUT, The only thing is, the rear driver's side door vent window is busted out, but I've got a new one to match it. I don't know how to change it. Could anybody please help and tell me to get this off? Supposed to get a little rain tonight, and it's gotta sit outside.