Hawaiian Floral..............
I looked at that link you posted and the first 3/4ths of the page had great instruction and ideas and the proper types of adhesive to use.
Also at the bottom of said page, there is a link, that will take you to another page and show you step by step photos.
Seems the BIG problem after getting everything all loosened up and trim out is getting the headliner "board" out of the car!!