Get 'B-Rich'
Use the following code at the player creation menu screen: DOLLABILLS.
Get 'Busta Rhymes'
At the player creation screen, use the following code as the last name: FLIPMODE.
Get 'DJ Clue'
Go to the player creation screen and use the following code as the last name: MIXTAPES.
Get 'Ghetto Fabulous'
Go to the player creation screen and use the following code as the last name: GHETTOFAB.