Hello Al,
We plan to include header templates in the Q1 release. Until such support is available, the task is not very easy, but it is possible. I am attaching you a sample page that uses JavaScript to attach an additional tab. The tab content is defined in the "agendaTabTemplate" div. The example goes further, to emulate an additional view, but this part of it can be ignored.
All the best,
Tsvetomir Tsonev
the Telerik team