I think ti would be very easy. If you read the modding PDF it should be clear
create a new nation (see manual)
clear the nation (see manual)
and then I think you'd alread have a nation without recruitables
then you could add some starting troops or just do it with a pretender.
I think it's a waste of your time trying to play it though, you won't get far without recruitable mages, certainly not if you don't have blessed troops
Here, try this
I used one of my mods and removed everything that made it a nation. I'm not gonna even try it myself if it doesn't work you'll have to adjust it yourself
__________________
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fantasy and
sci-fi? Try the total conversion
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Dragons wanted? Try the
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In for a whole new sort of game? Then try my scenario map
Gang Wars.