I have successfully made a UST disk with the image above, with a windows XP computer and omniflop. For my, it was necessarily to tape over the hole on the 1.44 mb floppy disk, on both sides, format the disk in the eiii and then use omniflop to write the image to disk. I had to add the extension .img on to the image in order to open it with omniflop. I was then able to copy the preset bank onto the eiii and it worked.
Man what a pain... but I'm glad I saw your post, because the tape over the notch worked! For me, I'm using Windows XP. I tried a couple HD disks and a couple DS/DD disks. The HD (1.44) disk with the tape over it, formatted in the Emu, and then written using EIII format in OmniFlop did the trick. There's an option in OmniFlop to automatically read the format. I was able to use this after formatting in the EIII, and OmniFlop wrote it fine.