[Stavis_L]

Someone a while back expressed an interest in something similar (a game of all thugs.) I don't seem to find it by searching, though.

You wouldn't be able to do what you want, I think, with the indy provinces. You can't modify the poptypes (but you can set all the poptypes to be no recruitables, or you can modify the gold/resource costs of the non-commander units to be uneconomical as per Edi's better independents mod.)

If you're looking for MP, though, I'd say it would be a heck of a lot easier to do as Sombre initially suggested and just use an agreed upon house rule (don't ever recruit any non-commanders.)