Measure the curtain track to determine how many clamps and cartridges you'll need. Use at least one clamp and cartridge every 10 inches for the most support.
Loosen the screw in the center of each ceiling clamp. Place the cartridge underneath the screw hole on each ceiling clamp, lining up the hole on the cartridge with the hole on the clamp. The clamp and cartridge need to face the right way. The sides of the clamp should fold upward, so that the clamp can clip onto the drop ceiling rail. The opening of the cartridge should point down so the track can clip onto it.
Lift the drop ceiling tiles gently and clip the first clamp onto the metal rail of the ceiling. Repeat, clipping each clamp about 10 inches apart along the rail.
Push the curtain track into the opening on the underside of each cartridge.
Attach curtain hooks to the track if you haven't already. Hang the curtain from the hooks.