The putty knife trick works good, but use two of them. The first to "feel" around where the door snap plugs are at. Just slip it under the door panel and slide it until you come across a door plug. The second putty knife is to get on the other side of found door plug, to use both putty knives to pry the door plugs up an out to release.
According to your profile, you have a '97. Don't forget the panel screws in the door handle, and the small trim screw near the window/door frame.
Once the door plugs are free, lift up on the door panel to release it from around the window edge. Becareful at this point because the door and lock rods are still connected to the door panel. There are some rotating snap clips that lock around the rods ends to the levers. Unsnap them from the rod ends, rotate a bit, then remove the rods. Keep track of which rod goes where...
Ivan