Upgrading Quantum Snap Server Capacity?

panicboy asks: "I had a client (a dotcom casualty) give me a new, unused 40GB Quantum Snap! Server in lieu of payment. I'd like to replace the pair of 20GB drives inside the thing with something larger -- say, a pair of 80GB drives. If this is possible, the thing would rock; right now, it's probably not quite enough storage to be worth using. I've looked for sites that might explain how to do this, but no luck so far. Anyone have any suggestions? I'd hate to have to sell the thing."