Results 1 - 10 of about 107,000 for fiberglass basics. (0.29 seconds)
http://www.google.com/search?hl=en&q=fiberglass+basics

here is a basic site that starts with the simple shit and moves from there...
http://www.carstereo.com/help/Articles.cfm?id=62

go from there and ask any questions you may have, basically once you start to mess with it , its self explanitory...