Character Names question

[Gray_Lensman]

I've also been trying to do this, but in my data files, there is no such thing as ...data\descr_names.txt. Does anyone know the reason for this?

Yes... You can't find it without unpacking it first. So, it requires unpacking that specific file... making the modification above... saving the newly modified file in the .../data/... game sub-folder and finally run the game with the medieval2.exe --io.file_first command line switch.