In addition, there are great tutorials here:
Garmin GNS530 Tutorial and Review
http://www.avweb.com/news/reviews/182453-1.html
Garmin Aux Pages Gems!
http://www.avweb.com/news/avionics/188339-1.html
Master the Garmin!
http://www.flyingmag.com/article.asp?section_id=13&article_id=45&page_number=1&preview=
Jean-Luc