Hi, this tutorial may not be so relevant to 'recent' Poser versions with the magic hair, but it shows how to do amazing things with modest geometry...
http://www.paultosca.com/
Scroll down to 'May 15' and the entry for his tutorial on low-poly hair.
Bad news it is one HUGE page, and very image intensive. Lots and lots of detailed piccies.
Basically, um, remember those 'snowflake' ornaments (and puzzles) that came flat-packed and slotted together criss-cross ??
Yup, he imitates complex hair using a lumpy spheroid base plus multiple intersecting planes, texture and transparency maps on a remarkably low 'geometry' budget. Okay, it does not lend itself to 'dynamic', but nor does hairspray...
For the budding 3DArtists in our community, there's a related Dec 10 tut, 'Making of Varga : normal mapping'. Read and be very afraid...