If you want to hide the manufacturer column on the cart page navigate to the /desktopmodules/smith.buynow folder and open up cart.ascx page in your favorite editor and scroll down to the gridview control and set the visible property to false for the manufacture column (line 33) or you can cut and paste the code below:
<asp:TemplateField HeaderText="Manufacturer" HeaderStyle-HorizontalAlign="left" Visible="false">
<ItemTemplate>
<asp:Label ID="lblManufacturer" runat="server" Text='<%#Eval("Manufacturer") %>' CssClass="SmithProdtext"></asp:Label>
</ItemTemplate>
</asp:TemplateField>