Hello David,
I replied your support ticket with the same question. In case anyone else has the same question, I would recommend using RadExpander instead:
http://demos.telerik.com/silverlight/#Expander/FirstLook
The Telerik QuickStart framework was developed for use only in our examples and was not intended to be used outside the demo application. We plan to provide its source code in the near future, as a real life sample application, using our controls.
Kind regards,
Valeri Hristov
the Telerik team