i just bought a garmin oregon 450 last night im trying to load caches on to it but im so confused i dont have a priemum membership quite yet can some one help me out i see that on the gps when i plug it in it has a gpx folder but in that folder are 2 more that say current and navigation can some one please help me out i want to get up and running espacialy with the paperless caching and i have no idea what this chirp thing that come up when i click the geocache icon on my gps can some one help me out please