A little info regarding this, I have been doing this by myself in my spare time, usually totaling around 3 hours a day everyday since FM released, due to this there will be a few mistakes but nothing that should make the game unplayable.
In regards to the what has been edited I have completed all teams in the top 5 divisions (Prem, Ligue 1, Serie A, Bundesliga and La Liga) along with the major teams across Europe (and a fair few young players outside of Europe), totaling just under 900,000 edits.
How to play Season 2012/13 on FM23
1. Move the downloaded file to your "editor data" folder:
Documents/Sports Interactive/Football Manager 2023/editor data
2. Open Football Manager 2023 > Start a new career > Select this file from the top right drop down button with database version (23.0.0 Update)
3. Click on the "Advanced Setup" button to select the leagues of choice and database size settings.
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