You could try this: In poser create a box that fully covers your figure (including the hair). Export it as an OBJ and import it into Bryce. Then Delete the Box. This usually works for me when I'm having trouble importing poser figures with objects attached to the it (like hair clothes etc..)into bryce. If that doesn't work you could try to save the hair seperatly as an obj/3ds/dxf-file and import it into Bryce. good luck