I'm afraid I will be of no use to you since I use a PC and Magellan . . . however Sudonim uses a Mac and I believe he has a Garmin. He might be able to help . . . don't toss everything into the waters yet . . . usually there's enough smart people here that can figure out an answer to just about any geocaching/technical problem.
I did however want to extend a welcoming invitation to you here at geocachingmaine.org.
"Courage is not the absence of fear, but the realization that there is something more important than fear."
"Death is only one of many ways to die."