~ $ su -
type root password
-enter on /etc/fstab and add this line
/dev/sr0 /mnt/cdrom auto user,noatime,noauto,exec,managed,ro 0 0
this line fix mount point on emerge.
~ # mkdir /mnt/cdrom
create a directory mount if not exsist
~ # chmod 777 /mnt/cdrom
set privilege to "users" group on directory cdrom (of default it is on "root" group)
~ # export CD_ROOT_1=/mnt/cdrom
~ # export CD_ROOT_2=/mnt/cdrom
~ # export CD_ROOT_3=/mnt/cdrom
~ # export CD_ROOT_4=/mnt/cdrom
these lines instead indicate to emerge where to take the levels of quake4
-insert Quake DVD4 disk in your mount point (on this example is a device /dev/sr0) and type
~ # mount /mnt/cdrom
~ # emerge quake4-data
the package quake4-bin is selected automatically...
-When ready change from Beryl Manager -> select manager -> kwin to improve stability and performance.