Are you a Premium member with geocaching.com?
You can create multiple bookmark lists, like "My favorite caches" or "Caches I want to find," that can be shared with others or kept private for your own use. You are also able to generate and add listings to a personal ignore list, for those caches you never plan to find but show up in your search results.
You can add the caches you have found to the list and I can use it to verify your finds. Mapsource is Garmin's mapping software, not sure which models it will work with.
http://www8.garmin.com/cartography/m...eTutorial.html
hope this helps. :)