In the US Premier League I have all the old MLS teams and one added from the American Second Division (Tampa Bay Rowdies who have increased srep and finances and youth academies to compete with the other teams)
The American Second Division has all the teams from the old Second and Third Division and two regional temas (which makes a nice 20 teams.
The American Third Division has teams from regional divisions that are in big(ish) cities that could draw a crowd. (All teams have increased reputation and finances to be able to compete)
Any fixes or suggestions feel free to comment below or pm me.
MUST USE DEFAULT DATABASE
Place file in Documents>Sports Interactive>Football Manager 2013>Editor Data
Create the last folder if it doesn't exist.
The Fate of US Soccer Is Up To You