I can tell you how to get about 8,000 skill points.
First turn autosave off. Your Player should be an athlete type. Go to drills, offense, dribble course. Go for layups instead of dunks. To get past the dummy, tap R2. If you get +1 speed, save the game. If not, quit and try again. When you get +1 speed. Go to attributes and take away that speed. If you do this 3 times, you should get around 9,000 skill points.