I have plenty of experience with mods with Oblivion, Fallout 3, and Fallout New Vegas and Morrowind doesn't seem to be any different.
I've downloaded many of the texture replacing mods from Povuholo's list and copied the texture files into the data files folder of my Morrowind game: Richer Textures, Connary's Textures, and pretty much everything else down that list until "Other graphics mods".
Stuff that doesn't require .esp plugins. Just to test them.
Ingame, the textures aren't changed at all. I removed the textures folder and launched the game.. and it looks exactly the same as when the textures folder is there.
Is there some kind of archive invalidation program that I need for Morrowind? I couldn't find one.
I don't know what to do with this game.
I'm using Windows 7 Home 64 bit if that makes any difference.