Blenderman BMRT shaders?

If and How can I use the stock BMRT or custom shaders with BlenderMan?
I’m using IRIX, Blender 2.23, BlenderMan 7.3, BMRT 2.5/2.6.
Sofar It runs good. I don’t mind editing rib files by hand. But larger scenes can get out of control.
Any Docs on BlenderMan?
Thanks in advance

I found it. I had to pick custom shader
Love it!!