Problem:

Normal CDs worked fine after I included user mount in addition to the supermount option.

Audio CDs however, do not. Opening KsCD, the CD is not recognised. It is looks at /dev/cdrom, but this directory doesn't exist.

After a cat /etc/fstab I get the following:

/dev/hda5 / ext3 noatime 1 1
none /dev/pts devpts mode=0620 0 0
/dev/hda7 /home ext3 noatime 1 2
none /mnt/cdrom supermount dev=/dev/scd0,fs=auto,ro,--,iocharset=iso8859-15,code
page=850,unmask=0 0 0
none /mnt/floppy supermount dev=/dev/fd0,fs=auto,--,iocharset=iso8859-15,sync,codepage=850,unmask=0 0 0
/dev/hda1 /mnt/windows vfat iocharset=iso8859-15,codepage=850,unmask=0 0 0
none /proc proc defaults 0 0
/dev/hda6 swap swap defaults 0 0

So I assumed the link would be /dev/scd0. That doesn't work either.

How do I get Mandy to play audio CDs!!!

You should probably create a symbolic link to /dev/cdrom as many programs will be looking for this device. Open up a console as root as do the follwing 3 commands:

cd /dev
rm cdrom
ln -sf scd0 cdrom

Someone suggested that to me previously. Doesn't work =/

Although he used

ln -s /dev/scd0 /dev/cdrom

Would that make any difference?

It's the same action more or less, but using ln -s /dev/scd0 /dev/cdrom means you don't have to cd /dev first.
The -f option on the link command is 'force' which will override existing links.
My fstab table entry for my cd-rw is:

/dev/cdrom /mnt/cdrom iso9660 noauto,user,rw 0 0

With this and the symbolic link KsCD works fine. The audio CD doesn't need to be mounted before you play it - KsCD recognizes it as an audio cd right away. In fact, for me the audio cd doesn't 'mount' using the mount command like a data cd does.