Hi Crazyguy,
It is common knowledge that several NT documents attributed to Paul were indeed written by others. It is therefore possible to identify trends and alternate doctrinal positions held within Judaism.
Whether Paul existed or is a composite figure does not concern me. Regardless of that question, the genuine writings do represent a particular position, and that is what does interest me.
I doubt that Philo wrote or contributed to any NT writings. However, I would say that Philo's influence on the NT came in the form of rebuttals of Philo in some of Paul's statements.
Doug