I have used this program RegionKiller its free and has worked very well for me
http://www.softpedia.com/public/cat/3/7/3-7-18.shtml
I have also used DVDRegionFree V3.62 Got it on
http://suprnova.org/ check under apps and then windows if thats what you are running
Maybe AnyDVD also at
http://suprnova.org/ I have never used it, If you decide to use it let me know how it works
Good luck