Have a look at you max/plugcfg folder. When you install the nif-plugins, a MaxNifTools.ini file will be copied there. Scroll to the [Morrowind]-section:
InstallPath=[HKLM\SOFTWARE\Bethesda Softworks\Morrowind]=@"Installed Path"RootPath=${InstallPath}\Data FilesExtractFolder=RootPaths=${RootPath};${MeshRootPath};${ExtractFolder}TextureRootPaths=${RootPath}\Textures;${TextureRootPath}\Textures;${ExtractFolder}\TexturesTextureExtensions=.dds;TextureSearchPaths=${RootPath}\Textures;${TextureRootPath}
The first five lines are fairly innocent. Now where it says
TextureExtensions=.dds;
it was
TextureExtensions=.tga;
when I first looked. Maybe thats all you need to do. The line beginning with
TextureSearchPaths=
is where the importer would look for textures. A bit further down you'll find
MeshRootPath=F:\Games\Morrowind\Original EN\Data Files\MeshesTextureRootPath=F:\Games\Morrowind\Original EN\Data Files\Textures
Just make sure the paths make sense. For some strange reason, "out-of-the-box", the TextureRootPath was correct, but the
TextureSearchPaths=
read
TextureSearchPaths=${RootPath}\Textures;${TextureRootPath}\Textures
in my case. So at least the 2nd texture search path would have been F:\Games\Morrowind\Original EN\Data Files\Textures\Textures - which of course doesn't work. So all I did was change the texture extension from *.tga to *.dds and changed ${TextureRootPath}\Textures to ${TextureRootPath}.
Max 9 does render the textures in the viewports and exports them correctly. Saves you quite a few mouse clicks as well