Whenever I try to start Morrowind I get this error message http://i586.photobucket.com/albums/ss309/Mad_Phellow/morrowinderror.png%C2%A0.
I can't think of anything that else that wasn't already mentioned in that thread.
Usually a re-install of Direct X (or the individual d3d8.dll file itself) should be a fix.
You shouldn't have Morrowind installed in Program Files if it still is. You can simply copy/paste your entire Bethesda folder elsewhere.
Have you recently tried downloading and installing a new d3d8.dll file. It's easy to find on google.