Can you just cut the liner and spray that liner adhesive in there or is it harder than that? I was think of removing the light on the top and cutting the hole ther and spray that stuff in then level it and put the exces material under the light and call it done. Does that sound right? Or is there another way? Advice Please?

It's really best if you take the headliner board out. You need to need to scrub the board with a wire brush to remove all of the foam backing from the board. Then you can spray the adhesive on the board, apply the new material and re-install.

Thanks IF I have time to take out the whole headliner I will. I will look alot better than If I just put some hack spray in there.