I've used Mylochka's hair in Poser 5 and Poser 6 without any issues other than sometimes the texture path was incorrect if I remember correctly on a few of the older hairs.  But once I fixed the files to the proper path, never had another issue.

"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