My question is still valid, but it seems there is an alternative solution(with some drawbacks) for what I try to achieve. So before I forget the details, I will share them here. Maybe it helps someone.
Instead of making Sebille smaller, I replaced the template of my character in the [code]globals[/code] file (within the extracted savefile) [Sebille's template --> Saheila's template]. I wanted a small elf, I got a small elf :)
GUID1:Your current character's GUID
GUID2:GUID of the NPC you want to switch
TEMP:A temporary string of your choosing. Make sure it does not occur in any of the files.
1.Remove all equiped items (just in case)
2.Dismiss all party members (otherwise they won't recognize you after the change) (remember to recruit them back after the changes)
2.Extract all savegame files into lsx
3.Find & replace all occurances of GUID2 with TEMP
3.Find & replace all occurances of GUID1 with GUID2
4.Find & replace all occurances of TEMP with GUID10
5.Repack & reload
6.If the change gave your character an undesirable status (such as permanent blind of Saheila), edit the savegame again to remove that
7.Modify the appearance using the mirror
Sadly, armors don't show up, and the corresponding body parts become invisible. This is the only downside I noticed so far. I am using a mod that can make armor skin disappear (morph vanish!) so it isn't too bad.
So, if you want to scale up or down badly, and you know an NPC whose scale/race/gender matches...
Last edited by scaler; 06/01/18 09:40 PM.