Quick recap: Only works with OpenMW. If you don't have OpenMW, go and get OpenMW, it doesn't cost anything and it's a great open-source black-box reverse-engineer recreation of the original engine. It's unfinished, but fully playable and less buggy than an unpatched edition of Morrowind.

=========Installation===================
1. To install the mod, create a data folder for the mod and add its path to openmw.cfg
2. To uninstall the mod, simply remove the folder from openmw.cfg
3. Find your "settings.cfg" file. Should be here:
Linux: $HOME/.config/openmw
Windows: C:\Users\Username\Documents\my games\openmw (username, harddrive and language may vary)
Mac: $HOME/Library/Preferences/openmw

4. Add these rows to settings.cfg:

[Shaders]
auto use object normal maps = true
auto use object specular maps = true

5. You're done! Launch the game and everything should work as expected.

Didn't understand a thing in the first two steps? Check this link for more info: https://wiki.openmw.org/index.php?title=Mod_installation