I just did my own headliner today, and it was as easy as he sais. I just used black felt because i had alot of it left over from a poker table. I used a few different glues, i used some fabric glue and wrapted the material around the outside, and glued it to to the top side of the headliner. I also used almer sprey adhesive, because i had some and figured it wouldnt hurt. If your doing this, make sure to cut your holes for the sun visors and plastic clips before you get it in the car, or it will be a pain. I can take pictures of it in the car if you want. My headliner was not sagging, it was just dirty and i didnt think it would sag because of the sunroof.

Thank you mobil one for rust proofing my driveway.