Install the BIRT Designer http://www.eclipse.org/birt/phoenix/build/
Update Sites: http://wiki.eclipse.org/BIRT_Update_Site_URL
For RTC 18.104.22.168 the default version of RCP Eclipse Client is 3.5 so we use the 3.5 update sites:
Eclipse Galileo Releases Update Site http://download.eclipse.org/releases/galileo/
Once you have added the plugins and restarted you are ready to do some actual drilling down on the report formats that come out of the box.
RTC 3.0.1 - Sample BIRT Reports