Currently, Burn.app offers two services, 'Burn To CD', and 'Burn Image To CD'. This service does exactly what its title reads. It accepts a list of file names (e.g. from GWorkspace.app) as well as a list of audio CD tracks. If no compilation window is currently open, Burn.app will open a new one and add the selected files/tracks. Otherwise you will be asked whether to add the selected files/tracks to the top most compilation (the last key window) or whether to create a new one. If you decide to add the selected material to an already existing compilation, the files/tracks will be appended to the already existing contents. Currently, Burn.app cannot distiguish audio files from data files. This means that all selected files will be inserted into the compilation as data if the selection is made of file names (e.g. coming from GWorkspace.app). Only audio CD tracks will be recognized as such. This service may be used to burn an already existing ISO image to a CD. Select the image in GWorkspace.app, for example, and call this service. Afterwards, check the parameters for the burn process and you are done. Burn.app does not care for file name extensions such as "iso" or "cdr". Via this service Burn.app will accept any file as ISO image. Note also, that you can pass only one ISO image at a time to this service.