Well, I finally manage to talk with the other S2 developer. And the problem is always communication everywhere, isn't?!
The guy is implementing a GLSL "interface" for the basic version of S2. He even showed me a screenshot of a postscreen effect. It does look very nice!!
We also talked about the lack on the scripting tutorials and examples on the manual. He said that he will take care of that.

So, I guess I will be making a new video tutorial very soon.