Might as well...
Another option for softmod upgrades with a chipped xbox:
This applies specifically to those with an X3 modchip, and the ability to run a game exploit. (You may be able to apply this to other chips.)
1) Get/Setup your softmod files on your PC (I just get the kernel version from the target xbox via MS dash and run Ndure 3.0 installer)
2) Run your savegame exploit on target xbox, Backup Eeprom, FTP it to the PC (Save it to a clearly named folder/filename on the PC!)
3) Load up the chipped/X3 Xbox, hold white button for X3 OS.
4) FTP to chipped xbox and access admin folder, copy eeprom to PC (Save it to a clearly named folder!)
5) Probably should make sure your chipped hard drive is unlocked.
6) Get Liveinfo Beta 3 (App for PC) and run it. Load the eeprom from the target xbox (make sure it's the right one)
7) Copy
Unique HDD Key Field. (Paste into notepad or something, if you want.)

Close that Liveinfo, and run it again (to be safe). Load your chipped xbox eeprom. Paste the copied
Unique HDD Key.
9) Save the eeprom to a different filename. (forsoftmod.bin or something)
10) FTP the new altered eeprom (forsoftmod.bin) to the chipped xbox. Say yes to the prompt on the xbox (for X3)
11) Turn off the chipped xbox, put your big drive in, start it up (white button) to the X3 OS, format, lock it, FTP the softmod files, whatever else you want.
12) Put new drive in the target xbox when done, should work fine. FTP back your old original eeprom to the chipped xbox.
Warning: Do not trust Liveinfo beta 3 to convert eeprom versions. It doesn't work. You can alter the HDD Key and save the eeprom and it works fine. Be careful that you always flash the same version eeprom, or you'll have problems.
Note that you have to reboot the xbox with an X3 before eeprom changes take effect.
This avoids having to write down the damn HDD Key and avoids all that confusion.
Just be careful with the eeprom version! Only alter the hard drive key and save it!QUOTE(Pillar @ Feb 28 2007, 08:39 PM)

Thanks guys for all the replies, ive tried everthing and still cant get it to go, My xbox always FRAGS.
Error number in the upper left of the screen?