Programatically changing the page layout of default.aspx page MOSS2010

In this post we will change the page layout of default.aspx page MOSS2010 using object modelling.
Below is the code snippet::

        /// <summary>
        /// Method to Change PageLayout For DefalutPage
        /// </summary>
        /// <param name="publishingWeb"></param>
        /// <param name="currentWeb"></param>
        public void ChangePageLayoutForDefalutPage(PublishingWeb publishingWeb, string customPageLayout)
        {

            PublishingPage publishingPage = publishingWeb.GetPublishingPage(publishingWeb.Url + "/Pages/default.aspx");

            if (publishingPage != null)
            {
                List<PageLayout> layouts = new List<PageLayout>(publishingWeb.GetAvailablePageLayouts());
                PageLayout newPageLayout = layouts.Find(
                                delegate(PageLayout l)
                                {
                                    return l.Name.Equals(customPageLayout, StringComparison.CurrentCultureIgnoreCase);
                                });
                if (newPageLayout != null)
                {
                    if (publishingPage.ListItem.File.CheckOutType == SPFile.SPCheckOutType.None)
                    {
                        publishingPage.CheckOut();
                    }
                    publishingPage.Layout = newPageLayout;
                    publishingPage.Update();
                    publishingPage.CheckIn("Checked In");
                    publishingPage.ListItem.File.Publish("page published");
                    publishingPage.ListItem.File.Approve("page approved");
                    publishingWeb.Update();

                }

            }


        }

Call the method as below
ChangePageLayoutForDefalutPage(mypublishingwebObj,"myPagelayout.aspx");


Hope this helps..