[RincewindTheWiz]

If the game cd also contains audio tracks, you need to make a "mixed mode" cd instead of a cdrom ISO (data) one. This is simply a format that combines data and audio on one cd. At least in Nero you just have to make a new compilation and select "Mixed Mode cd" instead of "CD ROM(ISO)". Then you get a window where you can drag and drop your data, plus a separate window where you can drag and drop audio tracks.