How to remove ALL trace of Cubase installation

Mac user OSX 10.7 and Cubase 6.
I have problems in Cubase after installing Addictive Drums. I can see the trace of installed files in Finder.
Addictive Drums show up in “Garageband” but NOT in Cubase as instrument!
Now I will remove all trace of Cubase (not just uninstall Cubase, I have done that without pos. result).
Have tested installation with another Mac OS on another HDD with positive result. So now I want to start from fresh with Cubase on my original HDD without replacing the whole OS.
How do I remove ALL, every… trace of Cubas installation??