QUOTE(IamReptar @ Nov 16 2009, 10:54 PM)

How simple, why haven't other people figured this out before?
Well why haven't you found it before. Finding modification on to alter the system behavior on a system like the Xbox 360 is really hard. Every major component behavior is supervised either by another component or remotely by Xbox live protocols. There's no way to tell how the Xbox will react to a modification on something like the Nand chip. We are only speculating on how this baby works until MS actually trigger something to make it so. In this case, maybe MS might come out with a scheme to make lives even worse for banned consoles users.
GodzIvan took the risk of trying this mod for us but he could have well triggered a special security measure that would have prevented the xbox to boot at all... maybe even permanently. The fact that your console is banned doesn't mean MS can't connect to your console and read some stuff on it. When the console try to connect to Xbox Live even if it is banned, there's some sort of handshaking, during this period of time, MS can probe your console and even modify it. Maybe even burn another eFuse without updating the kernel so it would prevent the Xbox to boot.
Sorry for you if you got banned before knowing this solution existed but don't blame anyone for not having found this solution earlier.