How to make a working class portrait

[Moire]

I'm referring to the little portrait that pops up when you mouse over your class' name in your character menu. It seems impossible to make your own picture. What I did was to extract the files from textures.bsa, including the sizes for menu50 and menu80, then I put my own picture over it in photoshop(with all sizes), saved as dds and applied it in the CS, but nothing comes up when I mouse over my class. I've tried googling this for a guide but there seem to be no guide who can tell me how to make it work. So what I want to know is, is it possible and how to do it? Edited May 18, 2011 by Moire