I’d like to get a NHL 09 running. I don’t think it is available in Lutrix ATM. It is available from Origin, and as I already have FIFA 19 running from there, my first attempt was to simply try to use the same prefix as FIFA. After a bit of experimenting, NHL wasn’t working, and I had messed up FIFA as well. 
Obviously, each Origin game must have its own prefix.
Having reinstalled FIFA, what is the best way of getting NHL 09 running? I’m guessing something like downloading a vanilla Origin script and modifying it?
I see the scripts are available as YAML and JSON. Does it make a difference which version I try to modify?
Is the only way of trying a script to start lutrix with:
lutrix -i </path/to/script>
?