That got me thinking, it might be easier to put the data on a flash drive and take that to the iMac, then put the data on a properly formatted floppy from the iMac. Theoretically that would skip having to deal with DOS/FAT formatted disks.

What unpackers would you suggest? StuffIt Expander has a lot of sentimental value to me (though I think my copies of it for my various Macs are lost to time, can't find them anywhere... >< ), but if something works better I'm all for it.