How can the nav data in such a thing be updated? The donor car is in illinois and I am in arizona. The guys says nav works for chicago but here? And he has no disks or remote. He says it works fine and I just pay the shipping but if I can't get new data for it, why bother? Disks sold on auction are from 2010. Again, why bother? I found a pioneer update site to login to but is it still active and what would it cost me as not original registered owner to get update? Thank you from new member Tom.