WoD models and hairstyles.

Hi, I started playing warmane a while ago and I tried making a character with a newer hairstyle.. at least I think it is newer for the fact that I cannot see it, instead I see just a color on a character's head... I have heard of people being able to choose them and see them by implementing the hairstyles themselves... How can I do that.. ? I really want to pick another hairstyle for my night elf due to the fact that I can choose only from 3-4 hairstyles and 2 of them are almost the same, and the other 2 are just... boring after u played with them too long...So.. ? Any help.. ?