If you're talking about doing anime-style animations, you can use the Preview renderer in Poser 7 to get a similar result, but not spot-on. If you step up to Poser's Firefly renderer, you can use Olivier's shaders, or you can use the built-in toon shader node in Poser's materials room. I've used both, and depending on the look I'm going for, I may use one or the other. If I'm looking for a simple two-step cel shade, then Poser's toon shader is more than adequate. If I need a multi-step celshade, or a celshade look with specialized highlights, then I'll use Olivier's shaders. It's a lot easier to learn how to use the built-in toon shader.

I would also suggest that you look at doing multi-pass rendering and compositing the results in a program like After Effects or the open-source Jahshaka.  This will allow you more control over how to blend your characters with a jungle that might be created in Vue or a simple still image.

Also, if you are rendering cel-shaded animations in Poser, make sure that you use only a single light and that its shadows are set to "raytrace". The shadow-mapping in Poser can cause "crawling shadows" if animated.

Posermocap - Motion Capture animations for Poser and Daz3D.