I have added the required items, and have gotten a 404 error code. Here is the current situation... I am currently using VS 2008 (ASP.net 3.0 with VB) and I made a reference to the NewtonSoft.Site...
Newtonsoft.Sitemaps.DLL!Newtonsoft.Sitemaps.SitemapWriter.WriteDouble(System.Xml.XmlWriter writer = {System.Xml.XmlTextWriter}, string propertyName = "priority", System.Web.SiteMapNode siteMapNode ...