Troy vs. the Iliad

The producer of the movie Troy, did a very good job of making it similar to the book the Iliad. But there were some differences in it, as well.
The gods played a role in the book and they determined who was going to live or die or which side was going to win or lose. In the movie it would've been hard to have gods in the movie so that's probably why they left the gods out.
In the movie they had a girl play Briseis and Chriseis in one person. They girls name was Briseis but was also a priestess. Agamemnon took the priestess away from Achilles; Achilles became depressed. In the book, however, Agamemnon takes Chriseis, the daughter of a priest, and Achilles' girl, Briseis. Agamemnon took Achilles' girl because Achilles made rude remarks such as, "your a sack of wine," and would not fight for him as well.
The movie and the book both displayed the main theme which was Achilles' anger and it also showed how he let out his anger. For example, Achilles' cousin was killed by Hector and he stormed over to the wall of Troy and challenged Hector. In the movie Achilles went to the wall and called out Hector's name until he came out. They fought a really realistic one on one scene. That was really cool how they did that in the movie. Hector died and was tied to Achilles' chariot and dragged in the dirt into the enemy's camp. In the book, Achilles was chasing Hector as if it were a wild goose chase. And the gods interfered so they would battle each other. Hector died and Achilles pierced Hector's tendons (soon became known as the achilles tendons) to his chariot and dragged him back to his camp.
Also, the movie kept the book real. They kept most of the important scenes. For example, Priam went into Achilles' tent to get his son back. Priam kissed Achilles hands showing that he recognized the killer of his son. He talked to Achilles about him losing his son and how he felt. And it would be the same if his father lost him. This made Achilles cry and in the book and movie it showed that Achilles isn't all just about violence and anger but also an emotional person.
Another cool part that they put in the movie was the Trojan horse. It's amazing how they built an actually horse and put people in there like the book says.
In the movie they added a myth or legend. In the movie Paris handed the Sword of Troy to a boy and his grandfather and told them to keep it. Mrs. Kirk said that those two escaped the burning of Troy and possibly found Rome. The movie added that Paris killed Achilles by shooting an arrow through his ankle. That is also what the book says too, that Paris kills Achilles by shooting an arrow through his ankle.
Even though I haven't read the whole book before nor seen the whole movie of Troy, they both seem pretty good to read and see. And in my opinion they did a very decent job of making the movie (parts of the movie that I saw) similar to the book.
Here is some things to think about. If the Iliad is true and the whole battle of Troy (I know they found Troy and it was burned), then who was the one who spoke to Achilles about not fighting Agamemnon? We know there aren't such things as gods but there is a God. Could God have spoken to Achilles? Who let Priam enter the enemies gates to get his son's dead body? Was Achilles just really good at fighting and untouchable in battle or did God let him be invincible? Or was this whole thing about the Iliad just a story for entertainment? I don't know. If you know something that I probably don't know please comment.