The drive is an 8X burner. I think it won't make the drive faster in writing by only reading.
This is what is included in the firmware, from Liggy:
NEC ND-6500A 2.24 BT Firmware
readme.txt - This file
224bt_fast.bin - 2.24 firmware including booktype and riplock patch
Booktype setting allows for setting the booktype of a +R/+RW and +R-DL DVD disc to DVD-ROM.
This improves compatibility for some older commercial players.
The booktype of minus media cannot be changed.
Rip Lock removes the rip (reading) speed limitation,
(usually set to 2X) on a DVD Video with CSS encryption.
You can download the firmware and read the included txt file.