why ISO, I never understood this. whats the point??? ConvertxtoDVD has an option to output to ISO image, its useless and often not playable in media players.
I dont think there are, but you can use Slysoft FREE Virtual CloneDrive and mount the ISO image, and then drag the vob files to a player like media player classic.
http://www.slysoft.com/en/virtual-clonedrive.html