I was playing around a little with MDK 9.0 a few weeks ago.As i
remember it had the auto or supermount feature for /dev/cdrom.
Deactivate it,there is a cofiguration-tool you can use as root to
do that in KDE.
After that you have to mount /dev/cdrom in console or rightclick with
mouse on the icon and use mount.Remember to umount.
This might help.There is a Gaming FAQ on www.icculus.org
is helpfull to.