Second level to open RadWindow?

[Megan]

I set up a page based on this example where windows can be opened with tab links:

http://demos.telerik.com/ASPNET/Prometheus/Window/Examples/RadWindowAndMDI/DefaultVB.aspx

I have a menu that uses  RadMenu with a drop down hierarchy similar to this:

<siteMap xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0" >
  <siteMapNode roles="*" title="Home">
    <siteMapNode url="Default.aspx" title="Home">
    </siteMapNode>
    <siteMapNode url="" title="Home2">
      <siteMapNode url="Default2.aspx" title="Default 2" />
    </siteMapNode>
  </siteMapNode>
</siteMap>

I got my tablist to show sub links like the menu.

<telerik:RadTabStrip OnClientTabSelected="OnClientTabSelected" ID="RadTabStrip1" runat="server" SelectedIndex="2" Skin="Office2007">
                  <Tabs>
                    <telerik:RadTab runat="server" Text="Home" NavigateUrl="HomeTest.aspx">
                    </telerik:RadTab>
                    <telerik:RadTab runat="server" Text="Home2">
                    <Tabs>
                            <telerik:RadTab runat="server" Text="Home2 Page" NavigateUrl="Default2.aspx"></telerik:RadTab>                                            </telerik:RadTab>   
                    </Tabs>
                    </telerik:RadTab>
                    <telerik:RadTab runat="server" Text="Home3" Selected="True">
                        <Tabs>
                            <telerik:RadTab runat="server" Text="Home3" NavigateUrl="Default3.aspx"></telerik:RadTab>            
                        </Tabs>
                    </telerik:RadTab>
                </Tabs>
            </telerik:RadTabStrip>

However, it only wants to open a window when you click on the main tabs, but I only want windows to open for the sub pages.

Is this possible?