Its called DiskXS. It's easy to use and I was able to create an empty floppy image with it. I needed a .img file and DiskXS lets you save it to that format.
I won't go into details how to use it. This is the correct URL of the guy who made it as the one in the help and about is wrong.
http://www.alexpage.de/diskxs/
After making the image I needed to load it as a virtual floppy. These days who has a floppy drive?
I used ImDisk Virtual Disk Driver.
It creates an icon in the control panel of Windows so you can configure it there. Its a little tricky getting your head around setting up a drive but there's heaps of help available if you search for it.
Hope some of this info helps you :)
