In trying to understand what the nodes are doing, I expanded the preview windows on all the nodes to get an idea of what Poser is interpreting.  The two 'illegal' hair nodes plugged into the Divide math function are creating a gradient as illustrated below:

                                                                                       

So, this is the arrangement I created based on what would be legal for Superfly:

   

Your control over how the gradient will behave is based on Value 2 of the Bias Color_Math node; changing the grayscale will shift the gradient up or down.