System Backup Image in DVD

view story

http://askubuntu.com – I'm using Ubuntu 12.10 installed alongside with Windows 7. Can I just have a system backup in the form of one or more DVD(s) so that I can restore the system with every package that are previously installed and if possible can I make use of that DVD(s) as a live CD with all the previously installed packages? If "Back In Time(root)" is installed in my system, will it be useful? (HowTos)