Play through the game and take EVERY bosses photo, and whatever gang members you want, but leave at least one. After beating story mode get any remaining pictures you haven't taken, and you'll get around 15 points. Save your game and reset your PS2. Load your game and you should hear and see the Villain Photo complete and gain another 15 hero points. Send them, save, and restart the process as much as needed.

After beating the main story collect 50 spider emblems to unlock the black suit spidey suit.