Attach projector screen to a ceiling... but the width does not match the studs. Ideas?
Most screens have both screw-mounts and hang-mounts (loops) built in - the loops often fold if not in use. If your screen does not have the loops then you could add your stick/board to it to get some. Or it may have largish-holes that a chain screw-joint link could be placed through on the end-caps.

Use the hang-mounts and chains and screw-joint links as seen on trailer safety chains (or carabiners if you'll be moving it frequently, I guess, and it's not a public-ish location.) It's actually more stable if the hooks on the wall are wider than the hooks on the screen, so the chains angle in. Use chain, not wire. I speak from experience on that point - also use chain and links a good deal stronger than the weight of the screen would seem to require.