Updating Your Xbox 360 NAND
Via Gentoo LIVE V2 CD
What you will need:
•	360 running Xell 
•	Gentoo Live V2 disc
•	Your new NAND image (ready to flash)
•	A USB drive (containing lflash.c & your nand image)
•	A USB mouse & keyboard
USB Preparation
**The process outlined in this tutorial depends on the USB drive being Fat-32 format**
Setting up the XBR Image 
 Before beginning the flashing process, we should make sure we have all our needed files.  In the case of a new release of XBR, you will need :
•	The new XBR image
•	Your original MS (Stock) NAND containing dash 7371
•	32-bit PC + NandPro
•	lflash.c (Needed later)
	a) Start by copying all of the above files to the root of the USB drive you'll be using. 
	b) Next, open a command prompt (Start->Run->cmd). 
	c) Switch to the USB device (eg: Type 'E:\')
	d) Extract your kevault & config raw data from your 7371 'Stock' NAND image:
	      nandpro 7371.bin: -r16 rawkv.bin 1 1
	      nandpro 7371.bin: -r16 rawconfig.bin 3de 2
	e) Inject your your kevault & config raw data into your new XBR NAND image:
	      nandpro xbr.bin: -w16 rawkv.bin 1 1
	      nandpro xbr.bin: -w16 rawconfig.bin 3de 2
You can now set the USB drive aside, and proceed to boot the Gentoo Xenon-Non-Beta V2 LIVE CD.

Using Gentoo Linux to flash your Xbox 360 NAND

1) Put Gentoo Live V2 disc in your 360 and bootup Xell/Gentoo. 
If you have a previous version of XboxReboot on your machine, you can boot into Xell by connecting a wired controller, and using the 'Xbox Guide' button to power on the console. This will also work with special controllers (such as guitars), and wireless controllers (by connecting a 'play n' charge' cable).

2) In gentoo, open up the terminal (Applications->Accessories->Terminal )
**In your terminal window type:
•	sudo passwd
You will be prompted to enter a password, and enter it again, to verify. 
You now have administrative privliges.

3) Plug the USB in 
**In your terminal window type:
•	su                            		(it will ask for your password, the one the just entered)
•	cd Desktop              		(to change dir to Desktop)
•	mkdir flash            		(to create a folder on the desktop)
•	dmesg | grep  -i  "SCSI device" 	(to list your flash drive)
This will display a few lines similar to:
[  38.230966] SCSI Device sda: 7831552 512-byte hdwr sectors (4010 MB)
[  38.234457] SCSI Device sda: 7831552 512-byte hdwr sectors (4010 MB)
The important part here is the part after Device (sda, could also be sdb, sdc etc)
Finally type:
•	mount -t vfat -o uid=gentoo,gid=users  /dev/sda1  /home/gentoo/Desktop/flash
 Remember to change sda to the value you had (and yes, the '1' should be there :)

4) The Flash
**In your terminal window type:
•	cd flash				(to change dir to the USB drive)
•	gcc lflash.c			(this will compile lflash and create an a.out file on the USB drive)
**You may get a warning - Don't worry about it. **
•	chmod  +x  a.out			(this will make it executable)
**This is where we flash the nand. Be sure your NAND image is properly prepared before proceeding!**
•	./a.out  backupdand.bin  xbr.bin 	(this will read your nand to your usb device, and write the new nand)
 Remember to change xbr.bin to the name of file you wish to write to the nand.

**Your NAND should now be flashed! Restart your Xbox 360 and enjoy!!**