Well, the new firmware flasher did work on a Lite-On drive in a FireWire enclosure, at least in my case!
I've just used VS0D.exe (extracted from R48VS0D.zip) successfully in the following configuration.
My Lite-On LTR-48125W sits in an external IEEE 1394 (FireWire) enclosure with the Oxford bridge OXFW911 (ME-320F from www.welland.com.tw
) connected to the IEEE 1394 port of Dell's Latitude C840, running Windows XP Pro SP1.
I have never installed any system ASPI, just Nero Burning ROM 18.104.22.168 and InCD 5.52.40.