Somewhat self explanatory, but for the record:
- Lebron plays for the Cleveland Cavaliers
- You can do this on any difficulty, so might as well do it on rookie
- You can adjust all sliders, so turn all rules off, and tilt all sliders in your favour
- Then just light it up with Lebron, once you hit 50 points the achievement pops so you might as well do 12 minute quarters as you can just quit out once the achievement is done.
Important note (I missed this the first time): this has to be done while playing against the New Jersey Nets.