This has only been tested on the original release. A "sacrificial" stat is required -- one you don't need (for a Mage that would be Strength; for a Warrior or Rogue, Magic works). Head to the level up screen and put all of your points into the sacrificial stat. Click Next, then click Previous and then hit Reset. Manually remove the points to the sacrificial stat. You should now have 6 points rather then the 3 you put in. Choose Next a few times and then choose Play to save the changes made. Repeat this process. When the stat turns negative the game will regard it as 0 but you will still be getting points for it. However, in order to bring the stat back up you must put the amount you took from it back in, which is why the stat is "sacrificial." The most you can put in at a time is 100 points.