Any way to add a new option to conquered settlements

[gabelo01]

Is there a way to add subjugating the population rather than liberating into a military alliance. I'de like a settlement to liberate in function "turn into its own faction," but start out as my satrapy. Rather than a military alliance. Is this possible?

[valerius karamanus]

Occupation decisions are hardcoded, but maybe a script can track the liberated faction and force it to become puppet of the liberator.
@Jake Armitage