Well, every shader can combined with another, but I don't know how because I'm no shader expert. But I understand that it's basically writing the both shader routines in one fx file; may be wrong.
From what I understand, thats correct. But Im only new to shaders myself. If you can post the two FX files, or tell me where to get em, it sounds like a good exercise for me...
"There is no fate but what WE make." - CEO Cyberdyne Systems Corp. A8.30.5 Commercial