Creating European Super League

Trying to make a 4 division league, 16 teams per division, using teams from around Europe, but it turns out I'm hopeless with the editor. Want the clubs to participate in this instead of their domestic & european competitions. Can someone explain to me how to do this?

The teams in a domestic division all have to belong to the same country for the edited league structure to work. What i would do, is switch the desired teams from your 'Euro League' with the teams in say, San Marino, and edit the old San Marinese league structure rather than creating your own. This is likely to take some time as the teams put in your Euro League will have to be replaced by another in their old domestic division, or the whole country will be cancelled out. Hope this helps.