Functionality description:

Manage any club from the top 10 levels in England. The initial release version adds: -39 new league competitions -75 new real-life England-based cup competitions, including the FA Vase -A revamped FA Cup, to include 6 qualifying rounds (which aren’t named correctly by the game… yet) -207 new stadiums -135 new cities -879 new clubs (includes some already in the game, but with no nation set, some purely historical, and others not in playable divisions)

Installation manual:

Extract the downloaded file to My Documents/Sports Interactive/Football Manager 2010/editor data