Farrell Equipment & Supply has a special on a Rokk Tools panel installation tool. Regular price $399.99 on sale for $129.99 with free shipping. They have some videos on their site and this thing looks sweet. If you hang panels this item may be a huge help. I took the below information from their site.
The Wood ROKKpro is a drywall panel installer that makes it possible for one person to quickly install sheets on walls and ceilings. Designed and calibrated for the installation of drywall, framing, and sheathing onto wooden studs.
The ROKKpro weighs only 12lbs, and is easily maneuverable for a single person. A single installer using the assistance of the ROKKpro can install up to fifty 4'x8' sheets of drywall on walls and ceilings in a mere 4 hours. Gain productivity, and save the hassles of additional crew or panel lift rentals. Increase job speed, labor costs, and reduce lifting related injuries with one great ROKKpro tool.