Regarding smoothing, from their FAQ:
And you said something for another smoothing operation?
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The latter smoothing operation corresponds to smooth geometry and is related to the density of the wireframe of your objects. In Kerkythea, you can perform a Loop Subdivision (can be found on the tree view, Modeling > Loop Subdivision on your selected objects) where each triangle of your mesh is subdivided in four new triangles (the process can be repeated for further smoothing). It is essential that your mesh objects are modeled properly – one thing you can do for greater safety is to perform a Vertex Welding (can be found on the tree view, Modeling > Vertex Welding on your selected objects) before subdivision. Note though, that there is a trade off between increasing the object density and rendering time – you should be conservative at how many times you perform subdivision on an object.

This is quite different from Poser's smooth polygons feature, and be warned that many models that are designed for Poser will go nuts when subdivided as described there.

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