retired_breakbred101

Scotland might be a good idea, its a closed-system.

What errors or bugs are you looking to avoid (as mad as it sounds)?

Retaining the players of a specific club should do the trick.

retired_jissca812

1) England, because you can have up to 7 World or European Leagues.

2) Don't clear the histories. It might sound obvious, but I've done it before, and it won't even load the editor.

3) As soon as a team from another country is swapped into another countries leagues eg. Real Madrid they will automatically change to that countries' nationality.

You could use a EDT file for the league, so that you don't have to change the db at all, and you can delete it easier, but making the file will take longer than use the editor.

retired_kayak

Make sure you save, test and backup after every league is completed.

Use the thread on the page on retaining a teams nationality - if you dont do this the teams tend to appoint staff and players from the selected league.

Raise the leagues reputations and lower every other top league, if you do this all players want to play in the league and means that the top teams stay top, eg even if you put Real Madrid in the bottom league they will remain competitive, while some teams will fall down the leagues.