Acyrotin

Hello everyone. I'm rather new to Second Life, just started playing it a couple weeks ago -though I had made an account some time before that-. I learned about the Crux avatar prior to my arrival to SL, and knew I had to grab them. I was wanting to know how to make a custom skin for the 'Crux' avatar. Is there a template to show how everything is mapped, or is it just separate textures for each individual piece -Head, Hands, etc.- ? Maybe I'm being a complete noob and I'm overlooking something very obvious, but any help on the matter would be appreciated.