Great job Isa and Alain !!
Hersto's web-page is worth a visit too ...
I guess I've heared/read that name before ...
There was another screensaver provided by Parallelgraphics (Cortona) here :
http://www.parallelgraphics.com/products/screensaver/
If i'm right, it allows some settings (like viewpoint tour and such). The result is an exe file. Easy to use.
Bisous,