Hi rolnxyz,

re:
> 1. Is there a way / script to convert a face selection to its corresponding curve line outline?

It looks like you found this one already? There is another version here too:
http://moi3d.com/forum/index.php?webtag=MOI&msg=5922.37


> 2. Is there a way to select all continuous faces in of object within an angle threshold? Many
> polymodeling programs have this, like cinema4d phong break selection, or RizomUV wand selection,
> or blender select linked faces. I'm trying to quickly select faces without having to click too much.

Right but MoI is not a poly modeling program and isn't designed to work on faceted model geometry like you have here. You're much better off doing this type of poly modeling in a program that's designed to do that type of work like cinema4d, blender, etc... like you mention.

For the Window selection method, drag the window in a view where you're looking straight down on the face, that will make it easier to capture them all in one window:



It should be possible though to make a script that will grow selection to adjacent faces that are coplanar. I'll see about cooking one up for that.

- Michael