Convert OGG to ISO

You won't be able to convert Ogg Vorbis Audio Files directly to Disc Image Files (.ogg to .iso conversion), at least not in the proper conversion sense.

Using a burning software, you can, however, create an ISO compilation, which can be burned on a physical media. In order to accomplish that, use tools, such as Nero Multimedia Suite, which allows users to import OGG audio and create a disc image containing ISO data.