Hi Mike: Go to www.hometime.com and look around there. However, your best bet is to go to the library and get a good book on the basics of drywall....there are many such how-to books.
As a general guide, yes you must have a framing member behind each drywall joint. Otherwise, later on when someone leans or pushes even slightly on the wall, the joint will crack. On walls longer than 8 feet, I hang my drywall vertically, as I don't like to take the time to make drywall butt-joints fit. And finally, a word on 'mudding' joints. In my experience, this is where the 'art' of drywalling comes in to play, as it takes an experienced and 'artful' eye and hand to get the drywall compound absolutely flat after sanding. The common error made by homeowners new to drywalling is to over-work joints, both in applying compound and sanding it off after it dries. Again, a good instructional book will help you here.