btcflash and universal flasher for unix

[Vassilis Virvilis <vasvir@iit.demokritos.gr>]

Halo,

I recently I stumbled upon btcflash, an excellent piece of software. I
have a BTC 1004 and I successfully flashed it.

My question is what is required for btcflash to work with other types
of hardware, especially plain DVD roms. Maybe the checksum algorithm?
Are the ATAPI commands different per drive or is everybody following the
standard (MMC-3)?

Thank you for your time...

Vassilis Virvilis