You won't be able to cd directly into the device. What you need to do is mount the device to a directory. If you take a look in your /etc/fstab file, you should see a line that looks like
Code:
/dev/hdc /mnt/cdrom iso9660 defaults,ro 0 0
If that's the case, then all you have to do as root is
Code:
mount /dev/hdc
cd /mnt/cdrom
and you should now be looking at the contents of your CD.
If the line is missing let us know and we'll help you out from there.