Hi,
From your description, I understood there is an issue regarding how to add new tab to CET.
Since this control/component is third party, for this issue, I recommended to consult the control/ component provider directly, I think they can give more precise troubleshooting/reply.
http://code.google.com/p/geckofx/issues/list
Thanks for your understanding!
Have a nice time!
Regards,
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