Use the run once and in the boot section, chose the proper floppy driver image. If you
uploaded it to the ISO domain properly, once you check the box, you should see the choice
of which floppy to use.
The cdrom should be there as well. I loaded Windows 10 and Server 2016 both with no
issue.
You have to have the ISO domain populated and when you click on it in the GUI you should
see the images. If you don't see them, they are not uploaded and registered correctly.