#ts3 cc bug

I'm trying something new and converting cc cas items into default replacements (inspired by how terrifying base game skirts are) and have a few questions. The first is how do I fix that bug that makes the clothes shine in game, the second is how do I get the default replacement to know how to morph without the original package in the game, and the third is what is a VPXY file and should I bother replacing it in the default packages?