Ghosting will never work.
Each xbox hard drive is locked with a unique HDD key to prevent use in anything other than the xbox it was meant for. Of course once you have access to the drive, you can unlock the drive with certain tools that are widely availiable, but in it's stock state, a mirror image is impossible (that I know of, I would love for someone to prove this wrong

)
Easiest and cheapest way I have found was:
007 Agent under fire (used) $7 at gamestop
Action Replay (new) $25 at gamestop [possibly much cheaper used]
This way you can mod any xbox console (yes 1.6 & 1.6b included) without opening it up, keeping the warranty intact if anything ever goes wrong.
-devz3ro