My problem was that there was no /media/cdrom directory to mount the /dev/cdrom to. Once I created the directory all worked well as per the instructions above.
I'm using the Parallels Virtual Appliance (PVA) of OpenSUSE. Whenever I try to use Sudo to install the Parallels tools, it asks me for the root password, which is conveniently a SECRET! How do I find out what this mysterious root password is by default???
I had the same problem as tim80 -- no 'media/cdrom' directory. When I tried to create it, it failed with a 'Permission denied' reply. I have tried to find a way to give myself permission to modify the 'media' folder, but have not been able to figure it out. Any idea how I can do this? THANKS!