1) Start with GoTY Vanilla Morrowind - Morrowind, Bloodmoon, and Tribunal. No official plugins, no texture replacers, etc.

2) Install http://en.uesp.net/wiki/Tes3Mod:Morrowind_Code_Patch with most of the gameplay changes disabled

3) Install http://en.uesp.net/wiki/Tes3Mod:Patch_for_Purists

4) Install the Official Addons Merged/Fixed from the same nexus page as Patch for Purists

5) Install https://www.nexusmods.com/morrowind/mods/45231