Do you want to watch DVD's on a television, or on a computer?
I recently discovered a software product called AnyDVD that fools Microsoft Windows into thinking that the DVD is playable in all regions.
Here's a review I wrote a few years ago of a portable DVD player that can be set to any region you want with a magic incantation on the remote control:
http://www.shira.net/tech-portabledvd.htm
I don't know whether that specific DVD player still exists, but I like mine.