Dead simple, go get AnyDVD and rip the DVD, then burn it back onto a blank DVD using IMGBurn as suggested
All defaults on AnyDVD are set to remove region coding automagically and IMGBurn is FREE
You can use AnyDVD as a trial as long as you want, you just won't be able to save any settings and it has a countdown to force you to wait before you can rip the DVD, so really its also free just very very annoying hence you then go register it to get rid of the counter
If its bigger than a 'normal' DVD-R, run it through DVD Shrink, which is also FREE (even though its not updated anymore but people still use it)
Or have a look at DVD-RB free, which uses HCEnc to give a much better quality output than DVD Shrink, but is much slower, as it rebuilds the DVD from scratch to match a given bitrate where DVd Sjrink strips what it think syou won't see, much like MP3 in stripping what it thinks you won't hear to get the very small file sizes