Truth be told, while I'd be happy to give you a basic guideline as will many other VGcharterz, I'd suggest looking for this information somewhere else.
Places like Youtube have loads of videos about this making them easier to digest and follow. Here you are bound to run in to biases and downright inaccurate information.
Something like this would be a good start:
http://www.youtube.com/watch?v=-FnnGouYpQQ
and
http://www.youtube.com/watch?v=lPIXAtNGGCw







