Is there any way that I can manually set my position on my Hero, e.g by typing in the street adress I am on or something like that?

You see, my GPS isn't working properly, for some reason. When it tries to pinpoint my position, it usually ends up a couple of miles away. This means that I can't use the navigator in Google Maps correctly, and, more annoyingly, the search results in Layar aren't correct.