I'm going to do the vinyl roof and headliner before putting the glass back in. I assumed that you could do both with the glass in but it would be a pia. The vinyl roof doesn't extend under the window gaskets does it? You could tuck it in?
Around the glass
I believe the vinyl goes under the clips though right? And I also believe you need the glass out to remove/install the trim clips. Maybe I need to give it a closer look.
Rear edge
What seems to be the most accurate way of cutting the rear edge of the vinyl along under the trim? Do the clips sit on the vinyl & the screws go through, essentially also holding the vinyl down? Or does the vinyl just go under the leading edge of the trim?