Writing an edited eeprom to the motherboard is not something I would recommend doing in generel and if attempted you should be careful and be sure you know what you are doing.
The eeprom contains vital information that the xbox needs on bootup, so if you fail in writing a working eeprom image back to the motherboard a modchip could be your only way out!!!
I take no responsibility.
I have personally tested the following with success on a v1.0 and v1.1 xbox (<- at least that's the eeprom version). I havent been able to test it on a v1.6, but have no reason to believe it shouldn't work for this version. The eeprom decryption and encryption has been tested and is working.
With the warnings out of the way I would say that :
If you follow this guide exactly I find it very unlikely that you should end up with a non working xbox.
Why do this ?
The UDE2 exploit is a working software hack for all current xbox versions (v1.0-1.6). It works by exploiting an executable found on the NFL Fever 2003 game, that will run on boot unlike most executables fond on game DVD's. Unfortunately the exploitable executable will only run on xbox's with the XBE region set to 1 in the eeprom. This is normally all NTSC/Canada xbox's, meaning the PAL and NTSC-J users are not able to run the exploit out of the box. It's is however possible to set the XBE region 1 without turning the video standard of the xbox into NTSC. This allows all xbox owners to run UDE without having to get NTSC TVs.
Note however that when setting the XBE region to 1, some of you retail games will not be able to run without loading a hacked bios using PBL or nkpathcer. This means that if you softmod gets screwed and you dont own a multiregion exploitable game (like PAL MechAssault). You will have to recover by doing a hotswap.
ltools 1.7.5 or above.
One of the exploitable games or another way to run the included habibi signed default.xbe
PART 1 - setting the xbe region (no risk)
When bootet to the ltools menu run "mini-linux". Make a network connection to your PC and telnet to the xbox :
IP : 192.168.0.3
Netmask : 255.255.255.0
User : root
Pass : xbox
Once in, do the following :
- Type xberegion and push enter.
You will see something like this :