From the thread you specified:
QUOTE
This post has been edited by sosotiit: Jun 14 2007, 03:00 PM
But if you say it's still the way to go for these drives I'll believe you.
Just a question, in the quote in that thread with the E64 error and stuff, what happens if you plug in the video cable in the xbox 360 but not in a tv/monitor? Will that do the trick?
EDIT: I found a tutorial for the latest iPrep. It looks like this tool covers the whole firmware backup and flashing process. Is that true?