And another tip, go ahead and put the screws for the dome lights, visors, coat hooks, etc. in place before you install the headliner. After it's in, you can feel them through the headliner. It makes locating the screw holes and cutting the headliner easier and more accurate.

One other thing, when you're stretching your headliner and fastening it into place, be cognizant of the tension you end up with where the coat hooks (or lights)have to go. If you stretch it to tightly in those areas, it may wind up too tight once you install the hooks or lights. I hope that made sense.

Good luck - I'm sure it will turn out great.