Hy there, let me introduce to you. First of all i am a FIFA fan now since FIFA 11. Until then, i was making PesComplete Editor for PES and Romanian League patch.
Because i changed to fifa on XBOX i was thinking about making a patch for FIFA but i need to start with a database editor. I started research to find the checksum and anyone who can help me with any information you have is welcome.
I saw there is a guy mattwidz who made an career editor, so MATTWIDZ if you see this, any useful info you have would be great if you want to share with the community.
Also i found this thread about a guy who found some attributes but not the checksum HERE
Hope i will find some info. You all have a good day!