There is a small guide for those who are not familiar with the method , worked for me
1. Download a DB Commander (
http://www.nba-live.com/download/pafile ... ile&id=729 )
2. Open a file named shoesacc.dbf of the specific Save game you want to edit ( works with rosters Saves as well ) .
3. Scroll to ISLOCKED colulm .
4. Change every line showing " true " to " false " .
5. Run the game , open your saved filed . You should have an access to all the shoes .
Good luck .