Volumio and Openelec on one sd card

Hi Guys,
I Hope You can help me. I am trying to install volumio and Openelec on one sd Card with bootberry. Sadly i dont get it working. Is someone out there who has a Little expierence with this issue?

So far i am trying to get volumio installed with Berry boot but it seems to be difiicult because You need a Special Image of volumio.

Greetings from Germany