Esther,
Under Specular, you can check "None" instead of "Current" or "Gloss". That should get rid of the shinyness. I nearly always use a couple of pose files on the texture sets before applying the Toon script. One sets all the skin diffuse to white, and the other removes all skin gloss, however, setting the Specular to None should get rid of the gloss also.
Then again, sometimes it looks better with the gloss. :-) (go figure)

On the settings, it looks like there was a mistake. For Dark Color, try .5 in the first column instead of 0.0