I love C6, but I did feel a bit led on about the ease of using Poser content with Carrara. That said, I have developed a flow for working with the textures and characters. ALWAYS, the textures must be adjusted in the shader room. Almost always, some extraneous color has been overlaid on the texture map. This is an artifact that is poser's "fault". Other settings are reliably wrong too.
After I fix the shader tree, I save the "adjusted" shader in the C6 browser or a scene file, so I do not have to go through that again. Doing all this adjustment takes time and inhibits experimenting around. It's enough to drive a girl to procedural shaders!
I think I will put my V4 in an inner tube, floating on the ocean near one of Carrara's tropical islands and take a break!