 Doing the Headliner myself.
I finally got fed up with the sagging headliner yesterday, so I decided to do some surgery. I got in the car, ripped the headliner off the sunroof, since it was halfway off already... only to find there's nasty plastic foamy sticky stuff underneath it. So I took off the sun visors, popped off the overhead lights, disconnected all the wiring, switches, etc. and also popped off the other panels on the sides of the car and in the back corners.
I peeled back the headliner, and had to pry it off of the sunroof fitting. It easily came right out the hatch. I then pulled off the fabric and used a putty knife to scrape away some of the glue. I still have to go over the headliner with some sort of solvent to thoroughlly clean it, but it's almost set for some new cloth.
I found a kit online for like 50 bucks I'm going to get, I'm at work now so I don't have the link. I also took pictures of the job, and the mess.
One question that I have:
I see on the ceiling, there's a big plastic plate that's covering all of the sunroof's complexity. I want to be able to get the upholstered part off so that I can glue the cloth onto it. If i take off this plastic plate, is that going to disrupt anything? I noticed that it's connected to the sunroof drainage system, but that's not really a problem.
All in all, taking apart the headliner in one piece was not difficult. It took me all of an hour to take all the pieces off and remove the headliner with no instructions or anything. As long as the fabric goes on smoothly, it'll be an easy DIY fix.
Pictures to come. Maybe I'll start a new DIY thread for that.
Jeff | 
Threaded Mode