That sort of hair is modeled just like a figure is. You need to get yourself a modeling app and learn how to use it. Start small and work your way up. I have been doing it for about 8 months now, and I won't tackle hair yet.

The other side of the process is learning the material room in Poser. You need to learn how to make tranparency maps and texture maps and how to apply them.

And you will need to learn how to rig in Poser.

Beyond that, there is a membership fee to get access to the secret handshake (I'm kidding).

If I had a nickle for ever time a woman told me to get lost, I could buy Manhattan.