[Pharo-project] How to correctly remove a package for everywhere?

So removing 'System-Object Storage' didn't work. I did: ScriptLoader new deletePackageNamed: 'System-Object Storage'. Now the MCWorkingCopy is removed (I don't see the package in Monticello Browser), but I can still browse the class DataStream, and the package is available from Nautilus. Now if I do: RPackageOrganizer default unregisterPackageNamed: #'System-Object Storage' I don't see the package in Nautilus, but the class "DataStream" is still alive. I can do "DataStream name -> #DataStream" ..et...when I browse it with Nautilus I don't see the class but the category _UnpackagedPackage.. so...how the hell can I remove this package and class from everywhere in the system? thanks -- Mariano http://marianopeck.wordpress.com