it would help to know what year your car is... please put your year/model in your signature, you can do so by going into your profile..
i redid the headliner on my 95 ssei, here is what i did...
the headliner is held up with:
both visors and clips (remove the 2 screws for the visor piece, and pull the tabs for the other part)
passenger "oh ****" handle (pull the tabs out with a needle nose pliers, they are very brittle!!!)
rear "oh ****" handles (pull the tabs out the same)
sunroof trim ring
velcro pieces on the rear