I'm interested, but I don't understand how to make it work.
I've found the two competitions you mentioned in the editor, but short of just adding the nations to the 'teams' tab and hoping for the best, I don't understand how to make it actually happen.
Just to check that we're both on the same page - I'm trying to make a sort of football version of the Six Nations. England, Scotland, Wales and Ireland (+N.I.?) all playing each other in a league tournament every year (Is it possible to decide yourself when it takes place? Presumably I'd need to stop it clashing with the World Cup and European Championships.... or can you only have it in non WC/EC summers?)