As to your second question, the easiest way to make the tab look as a horizontal one is to set bigger width to the sliding zone, set TabView="ImageOnly" and put a horizontal image.
Sincerely yours,
Svetlina
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking system and vote to affect the priority of the items