Liteon 451s region freeing

Hi guys,

I just got myself a liteon 451s and I’m happy with it, done some nice dvd backups using dvd shrink etc and all is working ok. I now need to back up some of my region 1 discs but i find myself limited by the 5 changes. With my old pioneer dvd rom drive i flashed the firmware to make it region free but the only thing I can find to make this new dvd writer region free is the ltnrpc.exe utility which appears to have absolutely no affect on the drive.
Has anybody got any ideas?

Many thanks