This is a pretty good newbie reference. http://www.vcdhelp.com/sefy/?id=ClassicalGuide.html Also, you can check out the guides here at afterdawn.com: http://www.afterdawn.com/articles if you would like to convert DVD's to SVCD or DIVX, try http://www.doom9.org they have great guides and software. Good luck.
One hell of a good place to check out for a newbie is... http://nickyguides.digital-digest.com/index.htm All the guides here go into very specific detail. By the time you know how to create divx, vcd & svcd you will know a lot of the stuff that digital video experts know.