[newbie] Zip question

[JM]

I installed an internal zip drive (ATAPI).  I can use only a preformated
zip.  Other zip disks I use give me the message I can't read superblock
or I have to specify the file system (depending what i did on the fstab
i guess)....

How do i edit the fstab? do i have to do anything else?
Also, the cdrom does not eject unless i log out from KDE.

Thanks