I can't help y'all, but for the future, you might consider doing what I do: as soon as you get new software on disc (no matter the source), make a disk image of it to stash on whatever RAID array (etc.) you currently use for your photos. (Discs hold at most as much as a filled-up CF card, often a lot less, so whatever you're doing today for photos is already more than adequate for disc images.)
That way, whatever happens to the physical disc, you can easily and quickly get to your disc image. Indeed, I couldn't tell you where most of my original discs are, but I can pull up the images in a heartbeat.