>Could this be added to the D60? If so what gadget do >you need and approximately how much does it cost?
D60 has no GPS function, the GPS information can not be added to photos directly when shooting. This problem can be solved by third-part software like Locr, geosetter etc, they can match photos with GPS. What you need is a GPS unit that records GPS datas.
Nikon has GP-1, but I would not recommend here. It can not store GPS datas. Solmeta geotagger is a good choice, as it equipped with 8M memory card, the price is about $250.00. If your friend upgrade his cameras like D90, the geotagger Pro will write GPS info to pictures directly.