EU3 folder\mod folder\ *modfilename#.mod
For example for MEIOU, it's ...EU3...\mods\MEIOU.mod
1) Open the AD .mod file with a text editor and paste the contents.
Should look something like this:
Except it may differ, and I imagine I know which line Strannik is afterCode:name = "NAME" replace = "common" replace = "history" extend = "gfx" ...etc....