I think the best way to learn about craps is to go to:
http://www.cloudcitysoftware.com/
and download WinCraps, the best craps simulator I have ever seen. You can download a demo for free and fool around with it, and it’s only $19.95 for a license. You can make any kind of bet there is, and the Help file is like a craps primer, very well written. It also has a powerful simulation engine, meaning you can program it with any system you can imagine (this takes some work, admittedly) and simulate millions of rolls.
BTW, I am not associated with Cloud City Software, although I have used this software for many years.
Cheers,
Alan Shank