But aren't helpers needed when exporting to GR2 after the animation is ready, and the bone position values are recorded frame by frame in the animation timeline? You won't know unless you try; I vaguely remember conducting such an experiment (with a simple animation) a long time ago, and it worked. Read post 292
P.S. Regarding your link - it's not easy to understand at first glance. Can you import a model and animation into the game without using Maya?