I arrived back in town on Saturday from shooting “Jennifer’s Body” for nine weeks and began my five days of prep before I begin shooting “Manure” for the Polish Brothers next week.   This is a moderately small union shoot with a very ambitious multi-character script to be shot in only 25 days. And if that wasn’t hard enough, with dozens of scenes on the call sheet each day, all but a few shots will be shot on stages, including a lot of day “exterior” scenes. I’m dealing with a lot of sets to