Why can't you just do what you would on a 'Normal' Xbox 360 to change the DVD drive? Spoof it!

The easiest way would be to open JungleFlasher, load the DVD drive's firmware your changing it to (Samsung or BenQ) at the bottom. (Open Target Firmware)
Click 'Manual Spoofing'. Change 'Spoofed As' to the original DVD drive that was in there.
Enter the Original DVD drive's key at the top. Click 'Check'. Click 'OK'. Then flash it like you normally would. (Flash the Samsung or BenQ drive of course!)

Done!

Except you can't spoof iXtreme LT and that's what I want to use.