I have noticed in the 1.5 update the character save is given a stamp '[M]' beside thge name. Upon disabling mods, to see if this cursed mark would be romoved, the '[M]' was gone and was listed saved into my unmodded character folder. I see Bethesdas point making achievments being diabled if you use godmode items and such, but if you use visual and weather enhancements -like myself- achievments should still be available. There must be a file somewhere that has a masterlist of .esm's approved by Fallout, finding it is the key. I don't know how to mod myself so I havent opened any of the game files files, but I did check the dlclist.txt plugins.txt and loadorder.txt for possible listing. Someone with more knowledge on how those three files perceive args and lists could work it out.