Paul
Here's what you need to do.
Buy Notes of a Dirty Old Man. It's a collection of short stories written by Charles Bukowski.
http://www.amazon.com/Notes-Dirty-Ol.../dp/0872860744
As you're reading it, try to find the likenesses or parallels each of the stories has with your experience shooting porn. Fill in the gaps when necessary and aim for about 2 parts non-fiction and 1 part fiction.
Sounds like fun.