It's pretty easy, especially if you are using the proper restore disks for your computer because all the correct drivers will be installed automatically, rather than you hunting them down and having to install them yourself.
Put basically, put the CD in the drive, restart the computer, press any key when prompted to boot from the CD (if the prompt doesn't appear you may have to change the boot order) and then follow instructions on screen.
What have you got to lose trying it?