@saku00 Well, the addition is now part of RetroPie, so you don't have to edit the file again if you update Dolphin.

@george-spiggott I found the solution:

in terminal type cd /opt/retropie/emulators/dolphin/bin/dolphin-emu

then type dolphin-emu and it will open dolphin

@mitu

alright, thats good to know,
i read that some others had issues playing other emulators afterwards, thankfully i didnt get no problems.

hi there, is there a way to install Supermodel on a raspberry pi version of Retropie ? would it run well on a Pi 4 8GB ?

You can symlinks some of the (larger) ROM folders to the external storage if you want to use both discs, otherwise you can just run all your ROMs from the external disc - https://retropie.org.uk/docs/Running-ROMs-from-a-USB-drive/.