remove the handle -- two phillips screws
remove the finisher around the door latch--one phillips screw
remove the window crack -- spring wire between the handle and door
there are two grey "rivets" (top left and bottom right) push the center pin almost through and you can remove the rivets, be careful to not loose the center pin and you can reuse
then slide the panel up -- there are a series of two piece plastic "christmas trees" around the door--chances you will break some of them but they are a bit overkill -- my passenger door is down to about one third and it is fine.
consider treating the inside with a rust proofing or undercoat to prevent corrosion