Im a big fan of B20 but I don't think it'll make a good mission in ofp, the action is to spaced out and I'd get bored of just walking through the desert.
But if you really want to go a head with I'd suggest either leaving out Chris Ryan's e&e or doing it with cutscene's. He doesn't really get into many contacts after the one after Stan buggers off so it would be pretty boring.
I suggest watching the documentary by Michael Asher aswell, it would give you a good idea of what the terrian looks like and a good idea of the first LUP.
Good luck mate, need any help just ask