Is there anything out there to teach you how to use EFILive? Specifically, for the duramax? I don't want to just but this and see if I can figure it out. I downloaded the software to "play with" and see if it makes any sense to me, but nothing yet!! This is obviously very expensive, and if I'm going to order something that's going to put me in the doghouse for 2 weeks, then I want to be able to use it.