In general a virtual CD-R behaves like a physical one, i.e. actions that are not possible with a physical CD-R won't work with a virtual one.
So after a virtual CD-R is created, it cannot be edited, erased, formatted, or otherwise modified. If you've created the virtual CD-R and want to modify it, recreate it using a new virtual CD-R.
Afaik you have to finalize a virtual CD in order to be able to be played in a stero system.
You can test all the functions with the 30 demo version if required.
Creation and use of empty virtual media