Most hair is found in the Hair Library or Figures. Clicking the double check mark will load all parts of the model and it's texture. You will find fittings (if any) and mats in a corresponding folder in the Pose Library. However, if you have the Document Settings on, say, wireframe, the transmaps needed for the hair will cause it to come in almost transparent. Change this to texture shaded and you will be able to see the hair then.