Thanks.
Its been a couple of years since I last read anything on Zoroastrianism (Avesta), but I remember seeing things that weren't that far off from the Bible - except that Lucifer (Angra Mainyu?) is held up with a bit more esteem than he ought to receive (e.g., almost on an equal plane with God, not a fallen angel). I believe they even held to the belief of a coming Saviour/Redeemer.
I believe that is why the Zoroastrian kings were fairly helpful to the cause. Obviously the hand of God is behind everything, but the Zoroastrians probably were able to identify a kinship with the Scriptures. And it might have also spurred the Magi (the wise men from the East) in Matthew to seek the coming King.
Anyways, an interesting topic - the details of which are unfortunately lost in the dust of time...