Load model: to get it into the program. Save as new model: to get the mapping data that you just generated into the obj file. In Poser: view a hair model with a mode that shows the polys (hidden wire frame or whatever). View the model closeup and from all directions. Look at the size and shape of the polys. Now when you generate your map, you want the polys to spread out in 2D in a way that keeps that shape as much as possible. Racked polys, sretched polys, squished polys will all make a distored texture when applied. Anything that you do will be a compromise, just make the best one possible. Add to that, the factor of hair being generally linear and you should see why so few have done this with a satisfactory result. Making the model from premapped rectangular strips may be the best method as far as mapping goes, but shaping the strips ain't easy.