Cut & paste works very well.  Just watch the spelling, line indents, and case-sensitive zones and you're good to go.  I fumbled through this for a while until I got the right combination and format.  Now it works all the time.

Edit: What would be nice is a way to edit the script by adding your own custom shaders or an interface which could allow you to change particular shader settings for different body zones.  For example, the Nybras character has horns which I have instructed the XML to ignore.  But if I could attach the teeth shader to the horns and control the amount of specularity to just those parts, then I could designate specific individual settings across the whole body.  It's a bit much to ask, however....