How do I get Norton Ghost to backup onto a cd or dvd, and which one should I use/does it matter?
DVD is obviously more capacity. But it is always best to back up to a second hard disk. (and much faster)
Even better is to use norton clone.
I advise my customer to backup their images to an external hard drive. Most HDD images are too large for a single DVD, plus, if you always want to keep an up to date image handy, it's best to use a large storage device that can hold multiple images.