New editor is here http://lazy-rainbow.blogspot.com/p/nba-2k-12-my-player-editor.html
*Download .rar and open it up in winrar(google it) and extract the whole folder to desktop.Make sure the folder contains packageio.dll and devcomponents.dotnetbar2.dll or the tool wont open.Double click tool to open it.Load save file adjust accordingly.
NBA MY PLAYERS
L.James NBA MP: LBJ
Dwayne Wade NBA MP: Wade