Hey i just found the mod today as a solution to help me regain my progress since i got a new pc, mostly because i've also found a save file but i want to change the MC name which i saw you mentioning was possible with the mod on reddit. I've followed the install instructions but nothing pops up in my game, not just the MC name change, but the whole mod itself doesn't seem to work for me.
Viewing post in Eternum: Passive Walkthrough comments
Okay, first and foremost: The mod can have you start the game at any chapter with a name of your choosing, but it can't modify a name of a save you already have.
For that purpose I recommend URM: The MC's first name is stored in a variable called "mc"; use URM do change it and you're golden. Similarly, "lastname" stores the MC's last name and "nickname" stores his pseudonym inside Eternum.
Now, if you still want to use my mod: Installation should be pretty straightforward, just put one of the mod's .rpa files into your "game" folder and that's it. What players sometimes don't realize is that the mod is intentionally keeping a low profile, it's not always obvious that you have it installed. Go to the preferences and look to the right side, if there's a set of options titled "Passive Walkthrough", the mod is installed.
Finally, the hidden feature for starting at any chapter can be accessed by clicking the N of Eternum five times on the title menu. But only if you have the mod installed! I chose to make it a hidden feature, because using it makes your playthrough a lot less personal imo, even when you do customize your name. It's a cheat code, and that's how I'm treating it.
That's all I can tell you with the information you gave me. Hope this helps!