silverlight - Need UI replacement for Tab control

My client is not fond of the tab metaphor, so I need to come up with something else.

Does anyone have any ideas on what I could use to replaced a tab control (containing 3-4 tabs) with something else?

The platform is Silverlight.

EDIT:

Basically, the implementation SCREAMS for tabs. It's a configuration windows, that allows the user to configure different elements; such as Widgets, Gadgets, and Thingies.

So I have three tabs on the configuration page: one for each type of item.

Answer

I think the master-detail paradigm may work here.
For example, look at the browse dialog of Windows7 below.

Ignoring the possible tree structure on the left, whatever you select on the left, changes the content of the right panel.

A similar structure can be found in Microsoft Office, for example when creating a new document.