Scan the ceiling with an electronic stud finder and mark where each ceiling joist is with a pencil. Use a chalk line to lengthen out the pencil marks on the ceiling. Extend the marks to the wall if possible. This will enable you to see the joist marks as you cover the ceiling with the wood panels.
Measure the ceiling with a measuring tape. Mark the measurements from the ceiling onto the wood panels.
Cut the wood panels with a miter saw or a circular saw. Cut out light fixture or speaker holes with a jig saw.
Load a caulk gun with a tube of construction adhesive. Cut the end of the construction adhesive tube with a utility knife. Apply the adhesive on the back of the wood panels in a "s" like motion.
Lift the panel into place on the ceiling. Nail the wood panel into place with a pneumatic nail gun. Make sure you are placing the nails into place in the ceiling joists.
Continue measuring, cutting, gluing, and nailing the ceiling panels in place on the ceiling until the entire ceiling is covered.