Phil, when you say door trim, it normally relates to the entire soft panel INSIDE the car, not the weather strips that wipe the glass as it goes up and down. Therefore I would say it's virtually impossible to get the door trim off without taking the winder and grab handle off first
It may be my misunderstanding rather than yours though.
The correct term is known as the 'Door Card' from what I was told. To take the door card off, you need to undo the two large philips screws from under the grab handle then drift out the pin from the window winder. Once you have done this, put your fingers at the bottom of the door and pull the door card away at the bottom, it will pop out bit by bit until you get to the top. If you have the wooden cappings on the door then be carefull as they can break easily.
You don't split the doors in half chap
under normal circumstances anyway.
I know where you're coming from, it is quite fiddly to do. You need to get your hands inside the door however is best suited to what you are doing. I must have spent about 2 hours in the dark and rain trying to get the glass back into my door after some wally smashed it (before I bought it). Even after all that I think the glass is scratched and may need replacing if it cant be polished out.
Best to throw your toys out of the pram on the green one and save your better moods for the carmine one