"How do I remove the passenger-side AC vent? I want to replace it, but the screws seem covered by the windsheild frame."
You will have to remove the trim that goes around the door (inside trim). This is just held in place by plastic thingys and by the panel where the seat belt is attached to. If you get lucky you can remove the trim piece while not removing the trim where the selt belt is. you just have t be careful and it involves slightly bowing the trim piece to get it to slide out of the top.
Once you get this piece off....then 4 screws later you have the vent over off.
From: Jason Wenglikowski