Using either the included wood screw or the included toggle bolt, attach the L-bracket to the ceiling.

Make it nice and snug, but still able to be nudged to turn left or right a tiny bit if needed.

Now attach the larger C-shaped bracket to the L-bracket by threading the provided 1/4" bolt and wing nut through the lowest hole in the L-bracket.

Slide the projector into the bracket, making sure it's nice and snug, keeping the bracket as close to the front edge of the projector as possible. Plug the cable into the back of the projector and, leaving some slack in the cables, secure the cables to the upper hole in the L-bracket using the provided zip tie or twist-tie. This will prevent the the weight of the cables from pulling the projected image out of alignment.

Run the power cable and video cable down the wall and connect to a power outlet and DVD player. Run the DVD player's audio output to your sound system, and you're ready to turn on the projector.