Sup, man. Yeah I don't know ay. When I export the .TIFF from mudbox it gives me these two four leaf clover-like shapes - one on the top, one on the bottom.
This: http://i.imgur.com/K7H0uVk.jpg
So I find it's easier to just do the mapping in Mudbox, then switch everything over to PS.
Thanks man. It just takes a year to do what you could do in a few hours ^^ rip mouse trouble