Adorana has lots of free Dynamic Hair.  There is also a tutorial that comes with their hair models that tells you how to use Dynamic Hair. It's done in the Pose room, not the hair room. Very easy actually. Easy to set up but time consuming to have it run.

http://www.adorana.de/downloads/

Download a hair package and look at the readme file.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi