Install:

Start > Run > Type : %appdata%, then find 2K SportsNBA 2K13Saves , overwrite all the files.

for XP users: C:Documents and Settings[your user name]Application Data2K SportsNBA 2K13Saves

for Vista or Win 7 users: C:Users[your user name]AppDataRoaming2K SportsNBA 2K13Saves

Then go to NBA 2K13 and load it