Hi na,
Well, for starters probably the first demos on the site would be more appropriate:
http://demos.telerik.com/aspnet-ajax/panelbar/examples/functionality/firstlook/defaultcs.aspx
About the tagPrefix, you can just edit it in a register clause:
But you can not remove it!
Hope this is helpful for you!
Sincerely yours,
Nikolay Tsenkov
the Telerik team
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