Yes I know... I'm resurrecting an OLD thread but...
I wanted to thank you for posting this. I have the same device, and was trying to figure out the best way to configure it for use in my vehicle, and a simple search provided the answer.
I had assumed this method would work, but it's nice to know someone else has tried it out successfully.
Kudos for being a newbie (at least on this board) and posting useful info.