[Question] Armor Problems

[Pyro115]

Hi, Im quite new to this whole skinning but have done it before with mounts. I use MWCS to extract my armor that i want to change. I do everything that i would do to extract the pgn. I get the BLP and i use wowimage to decode it into the pgn. The problem im having is the armor is clearish in photoshop. When I edit and throw it back into wow. I have no changes. Am I doing something wrong?

And about lightbringer or any Tier 6 armor I can't seem to find the texture for it :S. Iv looked everywere, I checked all the .MPQ's and I can't to find it at all. Only Tier i can find is T4 :\

Answering either question would be an awsome help. Thanks -Pyro115