yeah, the dynamic hair doesn't transfer over. I occasionally get clothes that won't make the move, either..;) I usually use some of the old stock hair (if it shows up in Poser as a series of bright lines instead of a solid object, it usually won't go into Bryce..at least in 4..I don't know about 5). Grouper is a good idea..I'm stubborn and actually look for all the 'x.jpg' files it asks for..
Failiing that, you can also use 'organic' (it's what I call them) mats in Bryce. Check Wolfie's Den, Lunariad.com, Pixel Wonder, freestuff here, and that should give you a few to work with. The results don't always look as nice, but in a pinch..they can work. good luck.

I wish I'd said that.. The Staircase Wit

anahl nathrak uth vas betude doth yel dyenvey..;)