у меня вот так
PATH
C:\Program Files\Common Files\Autodesk Shared\;C:\Program Files\NVIDIA Corporation\Cg\bin\cgc;C:\Program Files\NVIDIA Corporation\Cg\lib;C:\Program Files\NVIDIA Corporation\Cg\include\Cg;C:\Program Files\NVIDIA Corporation\Cg\include\GL;C:\Program Files\NVIDIA Corporation\Cg\msdev_syntax_highlighting;C:\Program Files\Maya Cg Plugin\CgFX;C:\Program Files\Maya Cg Plugin
и все пашет