I made my first skins for BnW2 with some help from my girlfriend the other day, and I was wondering if people that have seen it/are willing to look at it think I should do an entire set for all the creatures... :rolleyes
In game it's Ctrl + S. It'll save to your profiles folder in My Documents.
Or else you can use the PrtScr button in the group next to F12. Then you'll need to Alt TAb out of the game and open an imaging app to view and save the screenshot