Do not use any unknown source image.Wrong gap info may cause rhea/phoebe failed to recognize the image.You may waste lot of time in testing. 1.For trurip clone cd images,you can use them directly. 2.For redump raw track split images,you can mount it to daemon tools,then use DiscJuggler(Demo version is enough).Choose "Create Disc Image" in new disc wizard dialog.Select your Daemon Tools Drive in left panel and specify the target save path.Then the most important thing is switch to the Advanced tab and check these 4 options: -scan gaps/indexes -r-w (cd+g) -pq -raw read 3.For games in redump collection that contains multi-index(e.g. Side Pocket 2),you need edit and remove lines that contain index id greater or equal than 02.Then mount them and use DiscJuggler. Daytona USA in redump collection are all tested working with Rhea and Phoebe with the conversion method above.