There is a tail, but it is straight down. I use a program named "Misfit Model 3D", in the developpement/unstable version (stable version don't support md3 yet). I use a background image as a guide, like this :
Because the background image used as a guide in my left view window is the same image as my texture, I just have to set up a projection from the left and I have textured most part of the model... But things are going really difficult for face which have normals toward up, down, front and back, because the texture looks streched... That's annoying... As for the horses, if you look at its front, you can see it is not really fine... And there isn't anything to do if you haven't photo of it taken from all 6 directions.
So I have reworked texture coordinate for all triangle that don't face right or left to limit this.