OK, I got it, finally. There are detailed instructions at www.KidNepro.com; these folks sell patches, and have detailed instructions on how to load them on their site (naturally they work for the factory patches too).

Also tried a shortcut that worked - instead of using a tape deck (I don't have one), I plugged the Tape In on the Korg to the Line Out on my soundcard, then just played the .wav file until it took (fooling with a software mixer to get the level right).

Thanks, and Good Luck All,
Irish