How to add timesheet in scrum projects areas?

Hi all,

I created a project area based upon Scrum process template and I'd like to add timesheet tab in Task workitem.
In scrum process template the timesheet tab is not available. How to add it in my project area configuration?
Do I need to copy XML parts of "Formal Process Template" to the XML of my project area configuration?
Is there another way to do that? Is there a way to share sections/tab/attributes between project areas?

Thank you.