So the headliner in my 1990 Audi 100 is sagging, and it is going to require complete removal for me to properly re-attach the headliner. I'd prefer to do it myself because I don't want to fork over the cash to have a professional do it. And besides that there is really only one guy I trust in the area to fix this car, since he is the only person that works with audis, almost everyone else that has done what should be small repairs on my car has screwed the car up more, and then didn't tell me. So, my question is, does anyone have any suggestions for removing this thing? it is attached to a large fiber-glass panel, which is what needs to come out, and that is what I'm having trouble removing, mostly because of the sun roof, so, suggestions? please?

Welcome to the forums.

I have seen couple of guys on the forums do it to their Audis. Most of them have the B5 A4 tho (I think it should be similar to your car).
You should PM thepirate since he had done it to his car.

Best of luck to you and keep us updated.