I ask as I'm almost curious if a firmware capable of booting DVD5 backups (of original and even 360 backups) would be possible. This is honestly just me being very curious about how the 360 works and authenticates legit discs - not something to really use in practice. His firmwares seem to be a good base to work off of, but to my knowledge he's never released any of his sources. If I could cram it into the 256kb flash of a Lite on or BenQ, I would use 3.0 as a base and add the DVD5 calls accordingly. To my knowledge, the firmware simply won't accept a DVD5 backup as is right now. @FAST6191 I'm aware experimented with this at one point - what did you find out?