Here are some VERY Useful guides to building setups, The first one is a overall explanation of everything.
The second one is a "Quick Tweak Guide" But I use it EVERY DAY. Please keep in mind where it says "Push" This is to make your car "Push" or be a little "Tighter", Vise Versa.
I take no credit for these guides, I just found them.. They are indeed very useful.
"Advanced Setup Guide"
http://membersmedia....de_20100910.pdf
"Quick Tweak Guide"