My dad did it once to connect the computer we have upstairs to the router which is downstairs in his office, but he left and we're changing the room where the router is, so I'm trying to figure out how he did it. It seems like there is a curve in the vent that's not letting me drop it through. This is probably a really stupid question but is there some trick or something to do this? Without drilling a hole in my wall/ceiling...any help would be appreciated.