I seem to remember having to hack my Morrowind.ini to get a better resolution in MS Windows (it topped at 1024 when my monitor was native 1280). You might give that a shot. You can also run Cedega without the pthreads option if I'm not mistaken, it's a command line option, something like
Also, there is an odd limit to the resolution (1152x864), im goinig to try the no cd crack and see if that helps at all. Oh and I dont know if im alone here, but one of those screenshots is windowed, which does not work on my computer due to "unknown frame buffer mode" Ok, I do have some error that says something about pthreads and my sytem, and tribunal wont even install!