used screwdrivers, but the special tool of PeteinMissionViejo sounds great.
Delia's technique is safest.
If stuck, make a PMV tool or use the old two foot screwdriver. The top of the door trim panel is vinyl over thin sheet metal. Place your PMV tool 1" in from the trailing edge of the door trim panel and push, or hammer, up as close as possible to a 90 degree angle (straight Up). It should pop up half way. Grip the rear of the trim panel and lift straight up. Listen to Delia and watch that aluminum strip. It bends very easily, especially at the trailing edge of the vent glass.
Occasionally they are so stuck there is danger of pushing your long screwdriver through the top of the panel (that's why a PMV tool is such a good idea). You can, if you must, pry from the end of the door. The sheet metal of the panel curves over the top of the door shell and ends at about the same place as the fragile moulding. You must pry the metal of the panel, not the moulding. The most stuborn panels want you to pry, and use the PMV tool simultaniously.
Replace your vapor barrier useing thin plastic and spray adhesive. Leave no water leaks.