Hello! I'm sorry if this has been asked before but I haven't been able to find anything that has helped me answer this question.
First and foremost, no, I am NOT using NOOBS. I have a 32GB SD card with only OSMC installed on my Pi.
However I am now thinking I'd like to dualboot my exisiting OSMC installation with RetroPie WITHOUT having to clean my card and use any installer such as NOOBS...
I would like to know if this is even possible, and if so, how? It's OK if the solution is not as simple as using NOOBS, I am quite familiar with Linux, terminals and such if that is required to make this work.
Thanks in advance