Are you sure it's not an option already in the create player hair styles? If not, I think if you start out with a template of Steve Nash you can then just use his hair and edit the rest of him how you like.
u'd have to know what face u used when u created that player then find the matching plyrface # in plyrface.viv, thats nearly impossible, but the only way to have his hair on your created player is to do just that