If you are inclined to try it someday, Bagginsbill's VSSProp will give you comparable, if not better, results without recalculating for light settings and rewriting for other character skin textures.  The link below will give you an exceptional and extensive overview of how to use this excellent process.

http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2737823&page=1