i saw some peeps asking for something like this a few pages... copied my post from xbox-scene
ok so i couldnt wait and i had to do it today... was pretty scary but it worked... so im ready to share my first small contribution to the scene... in form of a quick guide to install XBReboot v0.05 on your jtaged Xenon console from Gentoo Live CD running on your console... First NandPro steps are on winxp tho... (hurray for tetraboot PC)
1. Download and use Nand Pro B (i used this and i would risk saying it is a MUST)
2. Read kv from yout original nand backup: NandPro.exe ihada7371dash.bin: -r16 kv.bin 1 1
(i also had r6t3 removed after upgrading to 7371)
3. Inject kv into XBReboot: NandPro.exe xbrebooter.bin: -w16 kv.bin 1 1
4. Download latest Xell...
xell official release -> http://www.xboxhacker.net/index.php?topic=12373.0
i used redlines-> http://www.xboxhacker.net/index.php?topic=12513.0
5. Inject latest xell into XBReboot: NandPro.exe xbrebooter.bin: +W16 xell.bin 30
---- then we load up Gentoo on 360
6. You will need the xbreebooter.bin you have just created/modified in the steps above... and lflash.c from 360 repo by tmbinc
7. Start up gentoo on you xbox and get admin priviledges
8. Compile lflash (open terminal go to lflash directory and type gcc lflash.c)
9. That will output an a.out file (had a bit of trouble here)
10. Give the file execute bit: in same terminal window type: chmod +x a.out
11. Type in terminal: ./a.out
12. This will output the programs instructions... something like ./a.out readfile newfile where readfile will be whatever it reads from the 360 nand, and newfile will be what will be flashed... so it should look like:
/a.out nandbackup.bin xbrebooter.bin(the file u created, i had this in same directory as lflash.c and a.out)
it should double check some things and should work... it threw out some errors (logical block not found or such... about 10-15 of them... but it still worked) the lflash read me says not to flash 16.8 meg files blablabla... i personally didnt have any badblocks on my original nand backups and i had read some other having success flashing full 16 meg files so i went for it... now if you did have bad blocks then im not sure if you should go ahead and do this... please more knowledgeable users help me out here
anyways i rebooted my 360 and went straight into the new dashboard, was able to play a game with iextreme firmware from a while back (havent read up on drive firmwares yet but i think if this hack indeed has ability to run unsigned xex then firmware hacks might be obsolete now... anyways just thinking out loud)
turned of xbox then plugged controller on the back usb slot, powered on with Xbox button and went straight into xell, and was able to boot into linux and play emulators the old way...
I am quite a linux noob so i tried to make this mini guide linux noob friendly... glad to be able to help at least some of you out there...