This topic is covered on the mp3car forums, but thought I'd post a link here for anyone interested:
http://www.mp3car.com/vbulletin/cent...d-working.html
I originally started the thread with a problem (which resolved itself with an uninstall/reinstall). A user found a way to get weather data for your current location. I also found a zip code database that would be needed for the United States.