It should mount automatically. If it doesn't use the following (as root):
mount -t iso9660 /dev/hdc /mnt/cdrom
(if your CDROM is /dev/hdc, if not, use the right name)
or (as any user)
mount /mnt/cdrom
For the second option, you need something like
Code:
/dev/hdc /mnt/cdrom iso9660 noauto,owner,ro 0 0
in your /etc/fstab (you can edit the file as root).