If you really want to understand what all those settings are doing, prepare to read and study. The best basic info is a book (one of a series) by Carroll Smith called "Tune to Win". Tons of great info from basic to details. Some will be worthless to a sim racer, but the basic engineering stuff will allow you to understand what your doing when you fiddle with rebound, roll, and stiffness settings, not to mention caster, camber and brake bias!
Racing engineers work for years to get really good at this. You have several advantages...you don't have to spend millions or wait for the next nice day and/or available track time to test your settings. You also don't have to try and interpret what your driver is telling you!
The book can be dry, but it's exciting the first time you make a change to fix a problem...and it works!
On Amazon: http://www.amazon.com/gp/produ ... 2-1717836-4119328?ie=UTF8
Cheers-
M.Weisman
ID, USA