Data in the Province files :
owner = POL
controller = POL
add_core = POL
After changing, Data in the Province files :
owner = POL
controller = POL
add_core = POL
add_core = GER
How to easily change. If you want to learn, you read this post.
Firstly read http://heartsofiron3tips.blogspot.com/2011/04/how-to-change-similar-data-in-province.html#more
Select the file, such as the above link.
Write "add_core = POL" in the “Find what :” box.
Write "add_core = POL\r\nadd_core= GER" in the “Replace with :” box.
Click the “Replace in Files” button. That's all.