Ds roms on cfw?

Hi, i have a 2ds and ive got cfw on it, is it possible to install ds games onto custom firmware?

At the start of the year we travelled to disneyland paris on a coach trip and the coach crashed, we lost everything as the coach went up in flames. Including sons 3ds with his gateway inside it. I still have the blue cartridge from the gateway, is it possible to use this on the 2ds for ds roms?

Thank you