I'm finding it extremely frustrating, to the point it makes use of this TomTom Via 1605 totally ineffective. It will only allow me to put in the address for a route if I have the Zip code, which most often, I do not. Is there anyway to NAVIGATE to an address if I just have the street address and city, and NOT the zip code. Most often, I would not have that info.\r\nPLEASE HELP!! thanks!