Hi Stardust, someone else had a very similar request today and I just posted a script over in this other thread: http://moi3d.com/forum/index.php?webtag=MOI&msg=8230.1

Currently that script exports to .obj format, you can change it to export to .fbx format by editing the line number 42 that currently has this:

var filename = g_dirname + name + '.obj';

to instead have this:

var filename = g_dirname + name + '.fbx';

You also need to edit the directory name at the top of the script, that's the directory where the files will be written to, it will write a separate file for each group of named objects that are in the current model, and the exported file's name will be the object name. Right now it doesn't pay attention to selection, to make it only export selected objects, change line number 18 of the script that currently has this:

var all_objs = moi.geometryDatabase.getObjects();  

to this instead:

var all_objs = moi.geometryDatabase.getSelectedObjects(); 

You wrote:
> - Using same dialog as origin Settings

I'm sorry I'm not understanding this part, what is the origin dialog?

Hopefully that is close to what you were looking for though.

- Michael