How can i make my home page to display my products in rows/columns instead of listing?

I am using marketpress and the theme is Gridmarket. How can i make my home page to display my products in rows/columns instead of listing? My site is http://topdeals.lifeanswersandtips.com/home-3/ I only managed to put the product list there manually. I would rather want the home page to display my products in rows/column, sort of similar to the one found in the Home Page http://stores.ebay.co.uk/The-Home-Garden-Store Has anyone encountered this before?