Soleil Lapierre
From Stunts Wiki
Canadian creator of Stunts Edit, one of the external track/terrain editors, in 1994.
Soleil is also known as Ra, God of Sun in ancient Egypt. This nick seems obvious as "soleil" in French means "sun".
Soleil's Stunts website, not updated since june 1997) : http://www.cuug.ab.ca/lapierrs/creative/games/stunts/index.html