Access cd-rom

[Mike]

Hello again guys....
My son is still after me to install Doom on the HardDrive but when I try
and find it on my cd-rom by typing   cd /mnt/cdrom ls-l  I don't see any
files on there and I know that it has files on it...
Is there another way to see files on the CD or floppy either???
Thanx for any help...
Mike & son. :)