nothing to screw into
I'm trying to replace the air duct covers that I removed to paint the ceiling. It appears that they were just screwed in to the gap between the duct and he drywall. I know about putting toothpicks into a hole to make is smaller but this is more like a 5 inch long gap. Since I can't really change the location of the screws (holes are pre-drilled into the cover) what other options do I have? This was supposed to be the easy part of 200 things I have to do today Help!!!