:disagree: No. There isn't any RPC1 firmware for that drive or its twin Benq DW1670. You have to use software solutions.
Also, it is a good idea not to use commercial DVD playback software, Windows Media player included, as these do change region settings. Maybe real free software like VLC media player is different in that case.
And don't forget to disable autoplay - if you are running Windows 2000 or XP don't playback DVD video if logged in with administrative permissions. Never.