SkinVue is a Python script that you run from within Vue. In short, you run the script, choose a supported figure (V3, M4, Genesis, etc.) run the script and then through SkinVue's interface, you can adjust the settings to get things exactly how you like them: http://www.cornucopia3d.com/purchase.php?item_id=9247

As for scale, from Poser it more or less comes in at real scale. When I bring in a figure from Daz Studio, I end up having to wing it as the scale goes out the window. I'm sure there's some sort of formula between programs that you can use, but someone with more knowledge than I will have to chime in on that. And yes, by real world scale, I mean a real person's height, so M4 could theoretically be 6ft or so.