Ewker, we have what amounts to the same GPS, mine is the marine version so the model number is different, but other than that, I have read they are the same. If you go to www.gpsfiledepot.com you can get free maps that you can download using the Garmin MapSource software and then onto your media card using the cable. The software is free at the Garmin website if you don't have the disk already.

GPSfiledepot has forums and is a great place to ask questions about maps and pretty much anything else. The handbook could be better, but there are plenty of resources online.