Im searching for a firmware for my LG GDR-8162B

OK like the topiy says im searching for firmware for my drive.
Its an LG GDR-8162B:
Info:

DISCINFO VERSION : 1.5.5.9
VENDOR : HL-DT-ST
MODEL : DVD-ROM GDR8162B
REVISION : 0015
VENDOR SPECIFIC : 0BUDA 03/04/14
LOADING MECHANISM : Tray
NUMBER VOL. LEVELS : 256
BUFFER SIZE : 256KB
INTERFACE : ATAPI
RPC2 SCHEME : YES
STATUS : Set
USER CHANGES : 4
VENDOR CHANGES : 4
CURRENT REGION : 2

http://forum.rpc1.org/dl_firmware.php?download_id=1625

I have an LG GDR8162B and I want to option it as a slave. There are 4 pin pairs but I don’t know which ones to use. Does anyone know?