I was messing around yesterday and decided to make a maxed out PG for the kings, then went to play a quick game but instead I decided to play some blacktop, I was going through the teams and found my 99 overall PG on the kings roster so apparently you can use created players in blacktop if you assign them to a team regardless of their overall, so now knowing this I decided to try and make star players, I did this by writing down the info of a player minus the tendencies, signature skills and attributes then created a player with that info, assigned them to their team, released the player I was replacing then I used the roster editor by Leftos to copy the information I didn't have over to the created player I did this for Michael Jordan and LeBron James and we now have this
Jordan VS LeBron Blacktop
Jordan is on the 92-93 Bulls
LeBron James is obviously on the Heat
Edit: this mod is now obsolete as solovoy has released a roster that unlocks all players
NBA2K13 BlackTop SuperStars ALL Unlock!!