Black Patriot

Hi, having read though the entire thread I've got to say, great work people, this truly is impressive. Following that I do have a question, I live in Australia, and the local AV market is very overpriced. If I were to buy a Z110BT from the US and update it with the firmware for the Australian F20BT, would that get me Australian navigation? I don't care about using the radio or the DVD player (do region free disks work?) since I have my iPhone loaded with all my music. Thanks