How to set a default page on an MVC app?

I would like to have my base URL go to a specific category of an online store (a NopCommerce online store if that makes a difference). The URL of the category is: http://myUrl.com/c/6

After reading a few posts including Scott Gutherie's post about MVC routing I thought I could just add the following code to my Global.ascx.cs file:

    public static void RegisterRoutes(RouteCollection routes)
    {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

        //register custom routes (plugins, etc)
        var routePublisher = EngineContext.Current.Resolve<IRoutePublisher>();
        routePublisher.RegisterRoutes(routes);

        routes.MapRoute(
                "Default", // Route name
                "{controller}/{action}/{id}", // URL with parameters
                new { controller = "Catalog", action = "Category", id = 6 },
                new[] { "Nop.Web.Controllers" }
        );
    }

But this didn't seem to work. How can I accomplish what I am trying to do?

I have little experience with MVC so I apologize if any of this does not make sense.

Solution

looks like the most interesting bits are in the nopcommerce source code. the default route is registered as

    routes.MapLocalizedRoute("HomePage",
                    "",
                    new { controller = "Home", action = "Index"},
                    new[] { "Nop.Web.Controllers" });

you'll basically want to register your default route first, before the //register custom routes comment. should end up looking like this:

public static void RegisterRoutes(RouteCollection routes)
{
    routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

    routes.MapRoute(
            "Default", // Route name
            "{controller}/{action}/{id}", // URL with parameters
            new { controller = "Catalog", action = "Category", id = 6 },
            new[] { "Nop.Web.Controllers" }
    );

    routes.MapRoute(
        "CustomHome", // Route name
        "", // URL with parameters
        new { controller = "Catalog", action = "Category", id = 6 },
        new[] { "Nop.Web.Controllers" }
    );

    //register custom routes (plugins, etc)
    var routePublisher = EngineContext.Current.Resolve<IRoutePublisher>();
    routePublisher.RegisterRoutes(routes);


}

the first route may not even be necessary. i'm not sure. never worked with nopcommerce.