For information, not a bug: I find that WinCDemu 3.6 will offer “Select drive letter & mount” for an ISO file on a network drive, but won’t actually mount it (at least for my setup); it’s necessary to copy the file to a local drive. It would be useful to mention this in a couple of words in the program documentation. It will, however, mount a file on a local RAM drive (at least it did on mine, it might depend on the type of RAM drive), useful if you have a large RAM drive and don’t want to clutter your local drive with files you might forget to delete.