Place the emipre flag of the nation you want to delete to the position you want em to be.
Found no ways of deleting them just replacing but that is fine cause it solves your problem
BTW:
Do you know how i save a new scenario ?
i have no clue how to do it.
Overwriting a scenario that was displaced and deleted the info in it doesnt work cause the scenario will be loaded to 95% and then will (without error message ) go to the desktop.