It looks as though I may have confused you.

As root do this:
ls -al /dev/scd0
ls -al /dev/scd1

Then, still as root do this:

rm /dev/dvd
rm /dev/cdrw
rm /dev/cdrom

It will ask if you're sure- yes.

ln -s /dev/scd0 /dev/cdrom
ls -al /dev/cdrom
ln -s /dev/scd1 /dev/dvd
ls -al /dev/dvd

Post the entire screen please.