Hi Holger,
Have you checked out some of the standard features in the ICM?
http://help.sap.com/saphelp_nw70/helpdata/en/73/b5f99a019f11d5991400508b6b8b11/content.htm
The default format should provide the info you need.
Hope that helps you out but shout out if you need more info.
Cheers,
Katan