I'm not sure if it really matters for the HxC, but these 560K files are not .EII files, they are .EMUIIFD files.
It looks like having the the extension ".EII" was the problem. I set up Kryoflux to save the image with the ".EMUIIFD" extension, run them through the HxC software, and now the .HFE files on the SD card load into the EII and play just fine!
Thank you, esynthesist!
I only had time to convert 4 floppies. Of the 4 .HFE images I made, 3 of them worked fine, the 4th one doesns't load. If I select that file on the HxC emulator, then press "Disk" and then "1" on the EII, the display on the EII shows "Insert Perf Disk and Press Enter" and the LED next to the Enter button starts to flash. When I press the Enter button on the EII, the right LED on the HxC light for a moment, and then it goes out, but the image does not load.
If you'd like to look at the EMUIIFD file, you should be able to download it here:
http://www.synthroom.com/hidden/Football_NFL3_More_Hits_1.EMUIIFDI suppose there could be an issue with the floppy disk - I've not loaded this disk into the EII directly. It's a disk that I bought a couple years ago and I'm finally got stuff together to make images.
THanks again!
Kirk