Setting The Region Of You DVD In Ubuntu

I have had no optical drive in my Laptop for a while since the original fell out a couple of months ago. I finally put in a DVD Drive this evening and attempted to watch a DVD. I started up MPlayer and got the following error:

libdvdread: Error cracking CSS key for /VIDEO_TS/VTS_01_0.VOB

This was happening for every DVD I tried. As it turns out, the error seems to have been caused by the fact that the region on the DVD Drive I put in was set to Region 1 (America).  Changing the region was fairly easy. There is a imaginately named utility called "regionset" available from apt (apt-get install regionset) which can quickly set the correct region. Run it as root (sudo regionset) and tell it that yes, you do wish to change the dvd region. Then put in the number for the region you're in. Once this is done, you can then hopefully enjoy your movie.