http://inmatrix.osnn.net/dvdgn410.exe or
http://www.inmatrix.com/download/dvdgn410.exe
DVD Genie allows you to modify the region code for popular software-based DVD Players including such players as Software Cinemaster, PowerDVD and WinDVD (among a few). It also allows you to tweak these programs with undocumented features to better fit your system.
DVD Genie only supports region free DVD drive. If your DVD drive is region protected (RPC-2), you should try DVD Region-Free to watch all region DVDs. Please note: all DVD drives as of 1 Jan 2000 is RPC-2 which means you can only switch the DVD drive's region for 5 times.
DVD Genie will also allow you to select which program runs when a DVD Disc is inserted into the drive and contains support for fullscreen Zooming on widescreen movies with certain players.
Freeware.