Hero model

[Keneth]

It doesn't matter whether you change the links to the data files or the data files themselves but in both cases you should override via mod files, not directly inside the game packages. And I'm guessing the error is caused by a conflict because config.txt works just fine in a mod package. I have no clue what part Irfanview played in all that, according to what you said, you had no need for an image editor.