I personally don't care about M$ (those Bills outside can kill each other and we'll have a better world, IMHO).
Back to the question: in what format the image is?
A good trick: mount a RAD: device, with the geometry of a regular M$ floppy and cast the image in there, if you have a standard (to Amiga) format.
.img is not a valid format to Amiga, I have to say.
.exe or .com too...
But if the image is in ISO format, go for it! Use mountISO (or ISOmount, don't remember now) from aminet.