Klaus,
Nothing available for free unfortunately, there a few solutions from external vendors.
This may help:-
http://www.dagira.com/2009/12/11/quick-tip-detailing-web-intelligence-document-contents/
Or you are looking at the SDK. I know someone who has written quite a comprehensive tool using that.
This may help you get started:-
https://bobj-board.org/t/80856
Mak 1 
(BOB member since 2005-01-06)