file_first = true causes a CTD

[shakeygames]

Hey. I'm modding MTW2 so I wrote this down in the medieval2.preferences.cfg folder:

[io]
file_first = true

However, the game just crashes if I include this.
Anyone know why?

[Gigantus]

There must be an unpacked\edited file in the game folder that has an error in it that causes the game to crash.

I would suggest you install my mod set up and experiment in there. Modding in the main folder will most likely lead to a re-installation of the game eventually.
And here is a guide how to unpack the game files outside the game folder.