I can tell you a couple of handy tips, but no details.
First, get the EZhanger below. It saves so much time and aggravation.
http://www.allseasonsfeeders.com/catalog.asp?cat=gcsSecond, use a water hose sprayer, if possible, to bathe the hog before you start. Never seen a clean live hog and it will make the entire process less messy and more sanitary. Start at the top and work down. Takes a little while cause the hair catches lots of the wallowed in dirt, but sure make a clean photo too!
Third, make a cut down the center of the back when you are skinning to match the one down the front when you gutted (field-dressed) the hog.
The skin peels off much easier when in two pieces and it is a quick cut.
pepaw