I suppose he wants to edit where enchant effects appear on an item. Lets say you have an enchanted sword. How does client know, that flames (or whatever) should appear only on blade? How does client know, what is and what isn't a blade? And how can you change this, in order to lets say make also guard be "enchanted" or to make just tip of sword be "enchanted"?
I think this is what he wants to ask about.