With my older TomTom (via model), I could add points of interests and as I drove, there were little icons with let me know that it was closeby. With this new GPS (Go 620), I can't figure out how to add them. The unit comes with the option to see gas stations, but I'd like always to see them - not just when I select them. I'd like to see certain restaurants that I like when I travel, police stations and hospitals for emergencies. How do I put these on my GPS? Can you provide step by step instructions, please?