First, remove the rubber stoppers surrounding the faceplate using a small pin. Remove the screws underneath by turning them counterclockwise. Slide a credit card around the edge of the faceplate until it pops off.
Remove the screw on the side of the hinge cover and slide the hinge out. Push to remove the hinge cover on the opposite side, as well. Slide on the new hinge covers and replace the tiny screw by turning it clockwise.
Replace the buttons on the side of the faceplate with the new ones. Place the new RAZR housing on, and gently snap it into place.
Replace the four screws by turning them clockwise and put the rubber stoppers back on top of the screws. Insert the battery and place the new battery cover on the phone.