I have just uploaded some videos to youtube that I hope will help you to get the most out of your dead hang workouts.
1- Dead hang Training (1 of 6): The Effort Level (EL) for Maximum Strength
2- Dead Hang Training (2 of 6): Technique
3- Dead Hang Training (3 of 6): Training with Added Weight
4- Dead Hang Training (4 of 6): The Maximum Added Weight Method (MaxWt)
5- Dead Hang Training (5 of 6): The Minimum Edge Size Method (MinEd)
6- Dead Hang Training (6 of 6): The Intermittent Dead-Hangs Method