I am no developer, but I can get RetroPie working on its own RPi. It would be lovely if there were a plugin that either installed retropie and integrated it perfectly, or something that allowed jivelite to launch retropie, and retropie to relaunch jivelite as it exits. (I know retropie and jivelite can both do this with kodi).
I know this is a dream, but it is the Max2Play 😉
I have tried to get the two working alongside each other without much success today. As I say, I am no developer 🙁