Next time anyone installs a head liner try this trick. put the screws for visors,dome lights,and hanger hooks in place don't screw them all the way in ,about half way will be good. Go ahead with the headliner install. When you are ready to install visors you can feed around for screws and make a small slit with a razor blade or a box cutter on head of them. If your new holes are to small don't try to make them bigger with razor blade ,use a phillip screw driver shaft in the hole to massage the material a bit . With you situation where headliner is already in place, get your self a big "hat pin" A big pin with a ball on the end ( I't's what you use for removing splinters ! ! ) You can usually find the hole in the under laying tin with out doing damage to the headliner.. when you are done brush the headliner with a small brush to cover holes you made so it doesn't look like it got attacked by a woodpecker...:anim_25: