Sorry, I have no idea. This skin was made only because the calendar is maded with graphics, and the lists are with fonts.
If you like the original Shadow4 skin, what you can do is: search for user folder; rename shadow4.r2skin to shadow4.zip; open it and open /xml/elements.xml; then search for the items font.XXX and change the size value. Unzip it again and change to .r2skin. After that, is only a matter of window's size (width).