I installed them the way the instructions described. They have a bonded bed flange all the way around them (supposedly no need for step flanges)
I saw on one of Vila's shows where they were putting in a skylight and they used this vucanized rubber with an adheasive on one side which was about 8-12 inches wide and came in a roll and you had to peal off the coating before applying it to the roof.
I have hail damage from a storm a month ago and they are paying for the roof to be replaced and it is prime time to get this fixed right.
Can anyone point me to a supplier for this stuff??