Yeah....I read all that but I dont think that my old Windows Vista machine has that capability nor do I have that menu option to select ISO9660. did notice that DVDs were burned with the ISO9660 format so I tried burning it on a DVD. Didnt work either. FWIW, I did finalize the CD-R and the firmware was the only folder on it. The file was not placed under any other folders.
I also have Audacity, freeware version. I will look at that and look for other sw that will support ISO9660.