The extended rom from the CDTV is only required if you want to use one of the CDTV's rom applications or if you want Akiko to show a boot animation like on the real CDTV. This boot anim can be configured in the Settings under CDTV/Animation mode. You can use my tool RipRom to save the extended rom from your CDTV's memory to disk. If you don't have a CDTV any more, you can purchase Amiga Forever by Cloanto which contains this rom. Please note: The CDTV's extended rom is not public domain! You need to own a CDTV if you want to use it or you need to buy Amiga Forever. RipRom is available on the Airsoft Softwair homepage.