This is my first time doing anything even remotely mod-related in Morrowind in over a decade. If this is more suited to /r/morrowind , let me know and I'll crosspost it there (posted here as it's dealing with tools heavily used by modders.)

Anyone found a reliable procedure to rename custom spells? I have Wrye Mash 86, mwedit 0.6.1, and Enchanted Editor 0.91beta as of right now. I have the GoG version of Morrowind currently installed, with the Overhaul (MCP updated to 2.2).

This is the method I'm trying to rename my custom spells (several spell names have typos)

1. Make a backup of the save you want to work with (separate of any that Mash and/or EE make)
   
2. Open a save in mwedit (may need to copy the save from $Morrowind/Saves to $Morrowind/Data Files)
   
3. Rename each of the SPELs in the save to what you want them to be, then save.

I load up the game, and I notice that my map is cleared out and the containers in my homes are also emptied. I view the save in Mash, and it has no dependencies on anything, and is missing FMAP and all 631 NPCCs. I've reverted to my backup. Does anyone have any advice on how to refine the method of renaming these spells?