Thanks :) I'll keep that tip in mind. But I'd still like to know how to do it within Poser without having to resort to using another program to achieve the effect. It is possible because I just went through the MP and came across very many black and white promos with coloured lips and/or eyes, so it is possible. I doubt very much that they are all using Photoshop and rehuing their textures or renders. I've sent off PM's to a few merchants and hope they will share with me what they did to get their black and white renders.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi