I feel your pain.
I lost ~400MB of 3DSM and Rhino models a little over a year ago when my hard drive imploded, along with a couple of hundred painstakingly crafted custom textures. All my models for all the shipsets I've ever created are history, along with 4 sets that were in various stages of completion. I also lost a bunch of 3DSM scenes and movies that I'd spent months creating with my models.
And I had at least 40 blank CD's and a perfectly working CDR burner sitting in front of me at the time. Argh. I use Symantec Ghost on a regular basis now to make sure it doesn't happen again.
Anyhoo, good luck with that...