Did you try removing the drive from device manager?

bas alberink wrote:

I have updated my Lite On (LTD-166S) DVD drive with incorrect Firmware
of my CDRW drive by accident. Now the bios and Windows 2000 does no
longer detect the DVD drive. I tried to force the bios to find it but
this did not work. I have the latest Windows Firmware for the DVD
drive but can't flash it because it can't find the DVD drive. Is there
anything I can do or is the drive ready to be binned ??