I found this driver for the tray mount version. It makes the drive all region complient. Have tested it and it works okay. Just follow the instructions in the readme file.
The following files are found inside the driver download file.
|upg5a.exe||91.5 KB||9 Aug 2000|
|readme.txt||1.2 KB||22 Sep 2000|
|autoexec.bat||424 bytes||22 Sep 2000|
|115F_127.hex||739.0 KB||22 Sep 2000|