DVD Genie allows you to modify the region code for popular software-based DVD players such as Software Cinemaster, PowerDVD and WinDVD, and others. It also allows you to tweak these programs with undocumented features to better fit your system. The new version has language support for the user interface, detection of the newer ATI players, can specify which drive to use for DVD playback, better 2000 support and more.
More info at: Tweakfiles
Thanks to Jim of Tweakfiles for letting us know !
