It is not possible, as far as I know, to delete individual files from an image.  If the image was on tape, this would necessitate re-writing the entire tape.

You can certainly use bplist to find all backups of those files but there's not much you can do with that information.

Now you could expire the images that contain those files but that destroys everything else in those images too.

You *might* be able to remove those files from the catalog with some hacking but I'd be contacting Symantec before even attempting that - they'd probably be willing to help for a fee.  That would essentially hide the files unless somebody wanted to import the tape.  You have to decide just how important it is - by putting a pricetag on it - to have those files on your images.

   .../Ed