How to configure a grid screen like NPR?

How do I create a grid screen like NPR?
http://sdrv.ms/1cX2BkW

I tried this:
screen = createObject("roGridScreen")
screen.setDescriptionVisible(false)
screen.SetGridStyle("two-row-flat-landscape-custom")

The description callout still shows and I'm not seeing item titles (I'm assuming that these are titles in the content metadata).

Thanks in advance for your help!