OK, I did a raw dump of the chip. There doesn't appear to be anything fishy going on or anything. The dump looks A LOT like ROMFILE.1S2's contents, but slightly different because it's a newer firmware version. I don't think ROMFILE.1S2 is encrypted in any way, shape, or form. I don't want to mess with the contents of the original chip just to be safe, so I'll see if I can restore the capability given a new chip I ordered -- SST39VF040. I'll put a blank SST39VF040 into a socket I'm about to solder to the card, then I'll see if I can get the OS X flasher and/or the Windows flasher to do anything.