Didn't work.
I brought the geometry into Hexagon and selected "select all".  Then I went to tools and utilities and clicked "orient normals".  In the properties pane I clicked "unify normals" and saved it under it's original name (I made a backup).  But when I load it in Poser, there is no change.

There are three layers in the Rievel hair: scalp, hair1 and hair2.  Is there any way of selecting the layers individually?  Anything else I can try?