These pictures are 'stolen' from Merlin's Haunted Hangout and click on the  pictures for details on the how-to portion.  For a pair of hands it requires 10 of the white plastic bic pens (which I found at the Dollar store for a buck), a roll of duct tape, cotton balls, wire, a 6" piece of thin wall pvc (this will make it easier to flatten for the wrist area) and some latex (or latex paint or Elmer's glue).
This seminar will be scheduled for the morning of the first day so that any additional latexing or airbrushing can be done to the set of hands. There will be an informal corpsing seminar on August 25th (thursday). You will need to bring protective gloves and paintbrushes.  You can purchase a bic hand kits on the OS Commerce site or at the park.  Remember it will be first come, first serve if you buy at the park.