You know, I think the Poser 5 hair shader node produces crummy results most of the time. I think you are better off removing it from the shader tree, and plugging the noise node directly into the appropriate slots on the root node then playing with specularity until you get an effect you like. That is if you even want to mess with Dynamic hair which I don't most of the time because for most applications a good transmapped hair is better. Sometimes you can get really cool effects with P5 hair though, in those cases it's great (as long as you don't need collision detection anyway.)