I have a 1937 humpback four door sedan and am perplexed as to how to remove the headliner. I found that there is a metal strip that has hooks on the back side for the headliner and those metal strips screw into the body. Then, however, there is the matter of the built in hooks for the windlass and now with the metal strips that hold the headliner covering the windlass. How does this all work when you cannot screw the metal strips in place once the headliner is "hooked"?