My recollection is MyDos can Read but not Write the Dos 2.5 format ED. But I believe that Sparta can read the MyDos ED, and naturally DD. I'm pretty sure that is how I used to convert Dos 2.5 ED to MyDos. It's an extra step if your goal is actual Sparta format, but it should work. I never cared much for ED, but as mentioned, there were quite a lot of disks in that format.