I notice at other forums and here, peolple are using "Xnormal" mapper.
I have discovered a Normal mapper by Nvidia called "Melody", I havent experimented with normal mapping yet, so cannot advise, however it maybe usefull. Also some very interesting developer tools ".fxcomposer" for shader developers, and the "opengl sdk" 9.5 may be of interest to some.
cheers
developer.nvidia.com/object/melody_home.html