I met Eric in Nantes some years ago and ask him to release it's source code and tools to the community, he just replied that "who would be interested by this..." I suppose then that it's just a matter of finding a way to ask him again so he won't refuse.
He also says that he'll be back to roots by developing a new game, the old way. I just hope that it'll happen not too far away in the future.
Kamelito