Referencing a sitemap file

I copied this code from msdn that references the web.sitemap file, the only prolem is I have multiple sitemaps in my site, doe sanyone know how to reference the them as this is looking for web.sitemap which no longer exists

Code:

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        Response.Write(SiteMap.CurrentNode.Title & "<BR>")
        Response.Write("<FONT COLOR='red'>" & SiteMap.CurrentNode.Url & "</FONT><BR>")

        ' What nodes are children of the CurrentNode?
        If (SiteMap.CurrentNode.HasChildNodes) Then
            Dim childNodesEnumerator As IEnumerator = SiteMap.CurrentNode.ChildNodes.GetEnumerator()

            While (childNodesEnumerator.MoveNext())
                ' Prints the Title of each node.
                Response.Write(childNodesEnumerator.Current.ToString() & "<BR>")
            End While

        End If
        Response.Write("<HR>")

        ' Examine the RootNode, and navigate the SiteMap relative to it.
        Response.Write(SiteMap.RootNode.Title & "<BR>")
        Response.Write(SiteMap.RootNode.Url & "<BR>")

        ' What nodes are children of the RootNode?
        If (SiteMap.RootNode.HasChildNodes) Then
            Dim rootNodesChildrenEnumerator As IEnumerator = SiteMap.RootNode.ChildNodes.GetEnumerator()
            While (rootNodesChildrenEnumerator.MoveNext())
                ' Prints the Title of each node.
                Response.Write(rootNodesChildrenEnumerator.Current.ToString() & "<BR>")
            End While
        End If

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