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Digital Digest -> DVD Digest
What you should do is that everytime you want to play a DVD movie, first check which region it is from, and then start the tools below to change the region setting of your hardware DVD player to match the region of the movie, and launch the DVD playback software within these tools (please refer to their documentations for more information). Do this everytime you play a DVD that doesn't match your player's current region settings, and you should be able to do this for an unlimited number of times (hence, become region-free).
If your player is not listed below, then you may want to try to rip the DVD to your hard-drive, strip out the region information in the process (to make the ripped movie region-free), and then playback the movie on your hard-drive. For more information, please refer to RipHelp's DVD Ripping Guide (use the "Rip the Entire DVD" section).
Below are a list of the most popular hardware DVD players/decoder cards, and the tools you will need to use to make them region-free (or change their region settings for an unlimited number of times) :