Hi,
I have a kindle with a screen that is not working, it's obviously broken enough that this debrick does not fix it.
Thought I'd just add some info for other people that might have similar problems as me:
The CD works great with a 2011 Macbook Pro 15", but not with a Mid 2012 Macbook Air 11".
If you have a a broken screen like me and want to turn on USBNet on a Kindle 4, you have to press: 8 down, center, 8 down center, 1 down, center, right.
(I found the screenshots on google image search and counted)
Well now I have a jailbroken Kindle with screen that is not working

Guess I'll have to order a new one on Amazon.