Hi Tiisetso,
The report viewers are part of the Telerik Reporting installation. Thus in order to use the report viewer download and install Telerik Reporting. Once you have installed Telerik Reporting you have to set up a report definition with a designer. For more information check out the Quickstart help articles.
Regards,
Peter
Telerik
Have you tried the new visualization options in Telerik Reporting Q1 2013? You can get them from your account.