My current headliner is completely torn up so I decided to replace it with a new camo headliner. I started to peel off the old fabric and the foam backer is still in tact so I think I will leave it unless there is a good reason to scrape it off. I am looking for any tips on replacing this that might help. I have a 1997 xlt extended cab. Thanks!
-Joe

 

Go check the how-to section. There's a really good write up in there on how to do it. It's what I followed when I did mine.