Are there any virtual DVD drives that allow you to *write*..

There seem to be quite a few free and inexpensive virtual DVD programs that
let you treat ISO files (and other formats) as if it was just another DVD
player connected to your computer.

As far as I am able to tell, none of these will allow you to create a blank
ISO file that you can then write to using your standard DVD burning
software. I did see some programs that will create an ISO from your source
files but that is not the same as a virtual DVD-rw drive. I need to be able
to burn to the virtual drive using my existing software.

Has anyone come across such a program?