Since you have Slack 11.0, the directories /media/dvd0 and /media/dvd1 should exist. If not, create them. After that, add the following lines to /etc/fstab:
Code:
/dev/hda /media/dvd0 iso9660 noauto,user,ro 0 0
/dev/hdb /media/dvd1 iso9660 noauto,user,ro 0 0
Now you can mount/unmount from the command line:
Code:
mount /media/dvd0
umount /media/dvd0
Also, you can add a desktop icon (if you're using KDE):
Right click on Desktop
-> Create New
-> Link to Device
-> DVD-ROM Device
Name it whatever you want (the default is probably good).
Click on the Device tab, and then select "/dev/hda (/media/dvd0)" from the drop down list.
Click on OK
Repeat for your second drive.
(Single) Clicking on the icon will mount the dvd and open up konqueror so you can browse the contents.
When you're done, close the browser, right click on the icon, and select unmount. The icon should change to reflect that it's now unmounted.
Edit: And like H_TeXMeX_H said, read the slackware book. Good stuff.