[Help] ¿How to create skins as it does SNOT?

Hi, first of all excuse for my bad English, I'm from latin america and I'm using the google translator.

My problem is I want to create skins for mu, then search google but the only thing I found is to use the MuImg and converted to JPEG files. Well, I did everything and opened with photoshop and I made some modifications rare xD, keep and file it again OZJ, among the many and still too: S. To me what I like to do is to invent armor, that is, as it does snot with his creations that are very good, I would like to make skins like snot, but I have no idea what program to use and how to have been changes etc.

Use Milkshape 3D to create models but you need a SMD - BMD converter and the only one I know of is in Pentium Tools but you have to buy it for about $150 =/

Uhh well, I'm going to stay with the desire to create skins: (. Thanks for your reply:)