When I clicked on Printer icon in MCC > Hardware my CD-ROM drive automatically opened and there was a message that something is about to install. I already set up prineter during installation of Mandrake 9.0 Beta 2 so there should no packages be needed. And as expected nothing was installed as the Printerdrake settings dialog opened with the prineter I configured during install. So I think that the dialog about missing packages should not show in the first place and CD-ROM should not automatically open as nothing was needed to install.
-- Live long and prosper!