PSX-Place

Hmm, I can't be super helpful in regards to BZZ unfortunately but maybe this will point you in the right direction because I also have been reverse engineering the Bin file format in general. There is basically two ways it will find the file.. the first is a hardcoded lba.

Game code will say to seek to this sector (0x930 bytes per sector, LBA also includes pre-gap which you can think of as 150 empty sectors before any of what you see in the actual bin file rip). Then there is 0x18 of sync data you don't care about (cd drive uses this to verify that it got to the right sector but it doesn't contain any game data). Then the next 0x800 bytes is the actual game data.