I'm hoping someone can propose something I may have forgotten.
The aim is to swap the Danish leagues with Belgian.
I've moved ALL clubs from the two nations to the desired leagues and set the Nationalities accordingly.
I've made sure that "Last Division", "Last Position" of the clubs as well as the competitions' history match.
The only thing I didn't do yet is remove the clubs' individual histories as that's a lot of work for something I suspect is cosmetic.
After many hours of editing, I started a game with it, created an unemployed manager and went on holiday. Last save dates to 01/11/06. When I press continue, the game crashes around 03/11/06. My suspicion is that this has something to do with the Royal League tournament which at the time of the save didn't have any fixtures set, but is due to start on 11/11/06..
The tournament takes the top 4 from last years' Swedish, Norwegian and Danish leagues.
I've made sure that nr. 1-4 in the Danish Premier Division (the old Belgian First Division) are set . Maybe Royal League tries to get the clubs from the current Belgian top division?