http://forums.Groundspeak.com/GC/index.php?showtopic=193374
i have a nuvi 250 and this thread is what i found to be the most helpful,
very easy to use the nuvi and really does work for true paperless caching, if your a premium member the pocket query are well worth the fee, if you really are getting into geocaching,
http://pilotsnipes.googlepages.com
sorry forgot to add click the link at the start of the thread, it has a walk through how to set up your nuvi,.