haha did you watch daily planet on discovery channel yesterday? An archeologist at the university of Cincinnati talked about the real Troy and flaws in this fictious movie.
There were a number of interesting flaws in the story he pointed out, I do not remember all. He asked how could they have put coins on the eyes of the dead since they have not developed the concept of coinage at that time. haha neat... He said that there are many scenes of gold in the movie, which would be unlikely in the late Bronze Age. Furthermore, he said based on evidence the Trojan War was most likely started because of money and power, not because of a woman.
There is not much evidence supporting the existence of Troy and Achilles and Helen.