Hi,
the solution to your question is called "Tile Layout". This is just another display mode for any UI configuration.
The assignment blocks will appear as tabs - so like the 7.0 GUI Look and Feel and it can even be structured much easier. It is only customizing and no development is involved.
When you are in the WebUi start the configuration tool, but use the configuration of page. There is a little button called "Switch to Tile Layout". All available assignment blocks can now be arranged as tabs.
To enable this button you have to register your overview pages in customizing first:
SPRO -> CRM -> UI Framework Definition -> Register Overview Pages for Tile Layout
The Tile Layouts can have also different structures like multiple rows or column or you arrange in a T-Shape. Just play around. You can define your own tile layouts via IMG
SPRO -> CRM -> UI Framework Definition -> Fact Sheet -> Maintain Fact Sheet -> Layouts in this activity.
Details described:http://scn.sap.com/docs/DOC-4100
Best Regards,
Hannes