What i might think could work quite well, is if you take the UV map of the character and make it white and then draw the outline and some of the details into it. So the texture would actually look like a drawing. And then you make another texture map where you add the comic type shading to like 3-5 gradient levels and then in poser you can blend the maps together, or just make it as a single map if you dont need to be able to control the outline seperately. Could be fun to try to see if that would actually give good results :D