I recenty purchased Byrce 5 (update)$150 and found out I cant update from my previous version Byrce 2. Does anyone know where I can find an older full version either Bryce 3d or 4. After searching the web all I could find was Bryce 4 at $170, this is more expensive than if I would have bought the full version of Byrce 5. So far no luck on ebay either.