You can get the Organelle to run things other than a Pd patch by creating a patch folder and inside place a run.sh. So it would look like this:
Patches/
Csound Synth/
run.sh
csound and other files ...
It would show up in the Organelle menu as ‘Csound Synth’ and it would execute the run.sh file when you selected it. So in the run.sh is where you want to start Csound and do whatever configurations.
The best place to understand the OSC messages being sent and received is in the mother.pd patch that opens with any Pd patch. You can download the mother.pd patch here
Also look at the Graphics Demo patch that has OSC messages for controlling the OLED screen.