There isn't any. The region code is set in the hardware of your drive. You CAN change it, but it's hard-coded to only allow about 7 changes before it locks permanently in that region.
There ARE region-free DVD players for home use, you can probably find them for a computer as well.
My advice, either buy a region-free player, or, buy the movie, then torrent it. Torrents ARE legal if you OWN the software/movie/music you're torrenting. Its like you're making a backup copy.