So hopefully you don't need to register to view the tutorials. These are from the xbox320iso.com forums.
This one covers the
iPrep Flash as I mentioned in the OP.
But here's one I found detailing the
JungleFlash although it looks like it only covers up to 1.51.
Are these tuts legit? I'm new to the xbox360iso forums so I don't know how credible the info is there. I've been an X-S member for years though and I've always got good info here!
~EDIT~
I just cleared my cache and followed the links from above. Turns out you need to register. Its free though of course. Maybe some of you already have an account over there.
I'll try and post the tuts over here somehow...