Here’s an old post on the gh24nsb0 thread, which cvs mentions how to extract the firmware from LG dvdr drives with mediatek chipsets.
This is the exact command I’ve been using to extract these LG firmwares.
./flasher.exe -d 1 -l firmdump.bin 6 00000000 00100000
(I only have one dvdr drive on the computer, and this command can be run at the user level from a command line prompt. On my computer, no admin privileges are required to do this firmware dumping from LG mediatek chipset dvdr drives).