…to everyone who sent or posted tech advice.
Unfortunately, I’d already salvaged what I could from the hard drive and sent it off for repair when I put up the post. Didn’t use the Apple store, though. I sent it to an independent Apple repair/upgrade shop in Maryland. And it’s apparently already done.
MORE: Well, hell. They installed Leopard when they put in the new hard drive, but in the process I lost the iLife ’06 bundle that came with the computer. Anyone know how I can reinstall my old iLife package? The two installation disks that came with the Macbook aren’t of much help.
MORE II: Okay, I found a dummy-proof tutorial here.