http://dwl.xbox-scene.com/tutorial/vad6038_tutorial.pdf
That is a tutorial on how a BenQ drive is dumped/flashed. However there is no hacked firmware for it yet and it won't be released until after the fall update from M$. (Please don't ask when that is, no one here works for M$ so we don't have any idea when they are going to release the fall update.)
Currently all you can do with that tutorial is dump the BenQ firmware to get the key, and then use that key to put a Samsung or Hitachi drive in the 360 that had the BenQ.