If it's the milennium horse you have to be careful because there are 2 extra bits of mane, sort of like lines along the bottom. I have highlighted them in blue and green here, one on each side of the horse. They need the trans map applied as well. Personally I think it needs a new transmap. the that comes with the textures is far from brilliant.

The greatest part of wisdom is learning to develop  the ineffable genius of extracting the "neither here nor there" out of any situation...."