Hey, I just remembered my friend had an error 5 code on his modified xbox with new HD. I don't know why it happened, but his HD was still locked. So.... things are not looking good so far... if you still want to test it, do this:
Get these programs from xbox-scene.com
ATAPWD
http://dwl.xbox-scene.net/~xbox/xbox-scene...rive/atapwd.zip
HDD Unlock/Lock/Disable
http://dwl.xbox-scene.net/~xbox/xbox-scene...e/hddunlock.zip
Liveinfo
http://dwl.xbox-scene.net/~xbox/xbox-scene...einfo-beta2.zip
Format a blank floppy as a bootable floppy disc.
copy atapwd and the hdd unlock/lock programs to your floppy boot disk.
Turn off your pc, change your xbox HD jumpers to master or slave, it depends on your pc configuration.
Connect the xbox hd to your pc.
Put the boot disk in your floppy drive.
Turn on your pc, make sure you set the floppy drive as the 1st boot device in your PC bios.
It should load the dos prompt, now run atapwd.exe
select your xbox HD from the list given.
there should be some letters, and + and - signs.
Look for the "E" and "L" columns, look under and see if they are both minus "-" signs.
Minus signs means that the HD is unlocked and disabled, which is good.
If the L column has a + sign, you're screwed, unless you can find another way to get the HDD key.
I don't know everything about the xbox, so I'm not 100% sure if it's impossible to unlock your xbox hd without copying the HDD key directly from your xbox. Hopefully Arakon or others have a better solution. If you have to trash your xbox, remember that you can sell parts of it on xbox-scene.com. People will buy the case, controller ports, cables, DVD drive, and other stuff.