They will not save your personal files and data. But the 'build your own' Recovery CD/DVD/USB drive could help you 'recover the OS' in a repair mode, not needing a clean or factory fresh re-install to the whole HDD.
IMO the best way to go forward and rescue your personal files and data is using a RescueCD - a bootable LiveCD with the whole OS on a CD or USB thumb drive. Ubuntu Desktop
I like the USB flash option. Most other distro's also have LiveCD options.
You can use DVD/USB/External hard drives as your storage media for the rescued files.