I have HP cd12 cd-writer (software identified as cd12d, HP label marked as C9631). Firmware version was LKS2. But it was some problems with modern high-speed media, and I can't find newest firmware from HP (see ftp://ftp.hp.com/pub/information_storage/software/fwrev.bin - newest firmware version is OKS2 version, but it's not present on HP ftp). Today I download newest firmware LS23 from Lite-On LTR-12101B (because one string on the writer case label is LTR-12101B), and now writer can write only some 4x cd-rw media.
It's my mistake - I don't made backup... So I want find HP firmware OKS2 (оr old LKS2, maybe). Help me, please!!!