...beforehand on my computer? ? i map out the most efficient way to get to multiple stops on my computer (i do this with microsoft streets and trips) but currently i just print this out and refer to it as i drive. i want instead to feed the info into a gps unit and use it to get around. i don't own a gps unit so don't know much about them. is it possible, what i want to do? how? what do i need?