I'm sorry you're having so much trouble with this--hopefully you won't give up on Poser. I use Poser 4 so I don't know if MAT files work the same in Poser 6. If they do, then try MatPoseEdit. You can load your .cr2 and easily select the appropriate texture files for each material and create a MAT file to apply the whole thing. Maybe the texture converter is making things more complicated.
"Democracy is a pathetic
belief in the collective wisdom of individual ignorance." - H. L.
Mencken