I'll post up one of dhc014's pages http://dhc014.rpc1.org/howto.htm
LtnFW is the preferred Windows flasher (UNLESS you are also going to backup the EEPROM), as it does not allow you to accidentally destroy the EEPROM contents, the one sure way to kill a Liteon, or at least be certain it will never be the same again, as the EEPROM is YOUR drive's calibration, and while loading another one if you mess up yours may enable the drive to work, but not well!
However, if you ARE going to tinker deeply, crossflash and patch, then I'd say you SHOULD backup the EEPROM and original firmware, so you have a complete "zero point" to return to, and you NEED LtnFlash to do that.
If you just want to load a firmware update, then use the official updates.
If you use dangerous tools, then you take responsibility for your own actions and don't go crying to Liteon if you screw it up - they've already made firmware hacking harder than it used to be, despite the fact that their DVD writers are sorely in need of any improvement the firmware hackers can make to them, especially the lamentable 12x and 16X models.