have a look here:
http://www.subsim.com/radioroom/show...=water+streams
check through all the pages to see what I was doing with it. I even included a downloadable example IIRC. This will show you what adding this controller can do. Once you understand how the controller works then you can make the cool and interesting effects or use it in ways it wasn't supposed to be used.
If I were you I would stay away from playing with the LocalWind and GlobalWind. LocalWind will force a local wind effect at all times based on the XYZ values you give. GlobalWind, well, I've found that it behaves exactly like LocalWind except in some situations (like my exhaust smoke). I haven't figured out what makes GlobalWind behave differently from LocalWind yet. Unless you're looking for a constant wind effect then I wouldn't use these at all.