In order to use NIE with AGOT you need to either:


1. add following line to "NIE.mod" file: "dependencies = { "A Game of Thrones" }"
OR
2. swap "NIE.mod" file with "NIEagot.mod" file and then change it's name to "NIE.mod"

If you want to use it again with vanilla CK2 you will need to undo changes.