Recently a downloaded a couple of files(mdf and mds) referred to a cd image.
I need now to write or mount it. In my case to write.
I use acetoneiso to manage those files.
So I get it....
apt-get install acetoneiso
After, when I launch the application, and I select the files, a popup(of the acetoneiso application) inform the it's necessary install a plug-in, puretone, to manage mdf/mds files. The plug-in is proprietary but free.
At the and of the installation, with the menubar button "Image Conversion" I convert the two files in a newer .iso file, and after I burn my cd....
Have fun...