Whoah, deja vu!
Mod the Xbox using an LPC mod, Matrix or whatever
Equip the Xbox with an UNLOCKED hard drive
(if you already have a drive set up with EvolutionX, etc, you can use this, but UNLOCK IT FIRST in the Xbox it currently lives in, using ConfigMagic)
Switch on
Format and set up the hard drive using an EvolutionX disc (unless you're using one that's already set up), I believe the Slayer's disc lets you install the M$ Dash, which is pretty much all you need for now
Lock the drive using ConfigMagic
Switch off
Remove the mod
Switch on, should boot to M$ Dash OK, no errors
Switch off
Do the TSOP jumpers
Switch on, use your favourite 007:AUF hack to flash the TSOP
If the drive has to go back to another machine, unlock it using ConfigMagic
REMEMBER, a drive can only be unlocked by the Xbox used to lock it!
(unless you already have the unlock password and are using DOS tools to do it, etc., etc.)