How to change spawn units of civil unrests?

[Lonck]

When a civil unrest happens one of two things happens: either the settlement goes back to the faction I took it from or it goes to the slave faction. When settlement changes to the previous faction its units all have experience 8 and have the gold shield and a silver or copper weapon. How do I change what units spawn and how much experience and weapon upgrades they spawn with? This is for bot RTW and BI since I play both.

[Aradan]

Units that spawn for rebels: each region/settlement has a particular "type" of rebels associated with it in descr_regions.txt. Each type of rebels referenced in descr_regions is defined in descr_rebel_factions.txt, along with a list of units it may have in the case of a revolt. Of course these units have to be available to the rebel faction (ownership, txtures)

You can't change the upgrades though, I'm afraid, it's harcoded.