<< I'm upgrading my raid array, and noticed "Norton Ghost" does not support raid configurations >>
If you mean that Norton Ghost does not see the two drives as independent entities, you are correct. It sees them as a logical unit, as the BIOS reports to the O/S. That being the case, you back it up just as you would any other hard drive.
You can back it up to another HD, another RAID array, or to an image file - whatever you choose.