Plop the contents of the Icons folder into Morrowind/Data Files/Icons.
Plop the contents of the meshes folder into Morrowind/Data Files/meshes.
Plop the contents of the textures folder into Morrowind/Data Files/textures.
Place Esroniet.esp into your Data Files folder and don't forget to enable it in the Morrowind Launcher if you are using the steam version. 

Credits:
-Karatekid5 for the texturing questions.
-AlekseiAlatin for the large tower resources.
-Reizeron for the modders resources such as the Crabshell Helm and Blind Slaughterfish.
-MelchiorDahrk for permission to create a Lyithdonea version.
-TamrielRebuiltTeam for permission to create a Tamriel Rebuilt version.
-darkelfguy for the Modathons.
-Digmen for Luminescent Flora.
-Bethesda for making the models and textures.
-Nifscope for making Luminescent Flora possible 
-michael163377 for making Glowing Bitter Coast, which has the glow maps used for Lumiescent Flora.
-Bethesda for Morrowind, the rest of the Elder Scrolls games, and support of the modding community in general.