Sorry, cheese2 -- without creating the copies, you can't currently get SuperDuper! to store the revisions. This is something you'll need to use a different program to do.
If you want to use Retrospect for the 2nd stage, you could have it back up the *contents* of the image, rather the image. In other words, do it while the image is mounted.
Hope that helps!
__________________
--Dave Nanian
|