Disk Hero was made to back up your most important files (email,
contacts, photos, financial's, etc.), but not your system and
application files, which are easy to restore via your original CDs. Technically, you can back up your applications and
system files, but we don't advise this. This is done for what's called
a "bare metal restore," which is not what Disk Hero was designed for.
Typically, if your computer dies, you get new hardware, and attempting
to just image your new computer with your old disk image via Disk Hero
(or any other backup application for that matter) is a tricky endeavor.
If you are ambitious, you are welcome to give it a shot, but it's not
something we recommend or support.