I have put together a short video showing Zbrush Tool. In the video most of the usage is via the sliders you can also change the quantity. Once you are happy with the shape created you bake it or extract the complete arrayed shape.

I have also shown the the bell curve adjusters even though they are good 90% of the shape creation is usually completed with main sliders.

To have something like this in MOI would take it into the GROBOTO style work flow and perhaps even Boolean Operations between Array Nurb Shapes.

Google Images / Groboto

Please find Zbrush Video under list location.

https://drive.google.com/folderview?id=0BwzK5muLiElSTnVNU21KdmlsQWc&usp=sharing