Hi Periwinkle, i do know some gps modles have videos you can buy on the operation of the unit, other wise west marine in seattle at the south end of lake union has classes after hours, for about an hour(i think) on thursdays, ed is the guy you want to talk to very intellagent and up to date, he even will talk to you over the phone in detail, Ed's helped me out more than i can begin to describe, Give him a call, (206)292-8663, Doug P.S. forgot to mention the classes are free, just a bunch of people who want to learn more