On the product listing page, if you have chosen a multi column layout in the cart admin settings you can change the ‘Sort Order’ to arrange the products across rather than down by changing the RepeatDirection="Vertical" to RepeatDirection="Horizontal". Navigate to your /desktopmodules/smith.buynow folder and open up productlist.ascx. On line 28 change the datalist property from RepeatDirection="Vertical" to RepeatDirection="Horizontal"
See the line below that is hightlighted in yellow:
<asp:DataList ID="dtProductslist" runat="server" Width="100%" RepeatColumns="1" RepeatDirection="Horizontal"