Would creating a tab be pretty difficult?

[aaronvlee]

Reason is I wanted to know if creating a task manager tab or a opera tab would be difficult. Basically, because I alsways use these two, it would be pretty cool to have that but I dont want to keep feeling like a mooch in the wm community, so I figured I'd learn to create one. Would I be starting in the registry or should I check out the calender tab cab to start?