Dynamic dataGrids?

I would like to create several datagrid objects on the fly using AS. Does anyone know how I go about creating an instance or multiple instances of these objects?

I currently have a page that has a datagrid working, but the object itself must exist on the stage and have an instance name before I can load it with data using AS.

Also, I would like to have a horizontal scrollbar due to limited space, however I cannot find any instruction on how to add a horizontal bar.

Any help would be much appreciated, thanks.

WTG