Blender 2.56 and Renderman!

Hi! I hope this is the right place to put this. I’m looking to use an open source renderman for blender 2.56 but I can’t find a straight guide on how to do it. Am I supposed to use Mosaic, aqsis pixie, what? Do any of you know where I can find a place with a guide or tell me how to use it with blender 2.56?

Thank you! Sorry for my newbiness!