Forget the CD... use GMAIL instead.
http://richard.jones.name/google-hac...ilesystem.html
You can put shell scripts into /etc/cron.daily and they will run everyday.
I do something like this:
rsync /home /backup/
tar cjf /backup/home.tar.bz /backup/home
cp /backup/home.tar.bz /gmail/`date +%d-%m-%Y.tar.bz`
modify to suit your needs.
Rsync is a very cool tool that saves a ton of time moving files around, I actually rsync everything over to a file server and do the taring there.