I've finally gotten all the permissions and everything else fixed, but now I am running into a problem trying to play a dvd with xine. I use the following command to bring up the xine player:

xine -p dvd:/

This seems t work fine, it starts to play the producer logo scree, but when it goes to bring up the next chapter, or menu it halts with an error message saying:

(Error reading NAV packets)

In the console window this error appears.

libdvdnav: Unable to find map file '/home/shaun/.dvdnav/SG1_V5_R1_YR2.map'

How can i fix this problem with the dvd nav files so that I can play the dvd? I ran the xine-check program and it says that my XServer doesn't support overlays and that my
XServer doesn't have any XVideo support, I assume that these problems would not cause the dvd to not play, so my next step after resolving the NAV problem would be to try and update my xserver to fix the YV12 Overlay and XVideo issues. Any help would be greatly appreciated to try and get this dvd playback to work, Thanks.

I found another post that had the solution (for anyone else with the same problem):

download from a linux package site a package called 'libdvdcss' install it using installpkg 'filename.tgz'
That should solve the problem.