Place the first sheet of drywall flat against the wall, either vertically or horizontally. Vertical installation is common, but it leaves ceiling-to-floor seams spaced 4 feet apart. Horizontal installation leaves a continuous seam 4 feet above floor level, which is easier to reach and features ceiling-to-floor seams every 8 feet.
Center the left and right edges of the drywall sheet over the metal braces.
Fasten the drywall to the metal braces with 1 1/4-inch self-tapping drywall screws. Attach the body of the drywall to the braces with screws spaced approximately 8 inches apart along each brace. Position each screw around the perimeter of the sheet approximately 3/8-inch in from the edge.
Butt the next panel against the last, as you would when installing over wood studs, and continue around the room.