I don't use your method to change files so I don't really know what effect it has (I use the excel files and the splitter tool - as per mod instructions).
I'm surprised that you couldn't see the command in the scenario file itself - I would have thought that would be the thing to change.
If you change the .ini file you should press F9 once as the game loads - the top right corner will show 'edit mode on'. You will be taken straight into the scenario
where you should immediatly save - this creates a new scenario file. Exit the game and then start a new game as usual and you should see the change.
I don't know if you will find any problems doing this - so up to you if you want to try