Help with faction tweaking

[Maion Maroneios]

Chairete!

I have been messing around with 1.2 lately (just recently downloaded, whohoo) and I wanted to take out Casse and remake them into a new faction. So, I decided to give the region to the rebels from the descr_strat.txt file located in the imperial_campaign folder. First of all, I cut/pasted the settlement (Camulosomething, capital of the Casse) in the list of the Eleutheroi cities, then I did the same for the city garrison (placed it somewhere in the immobile armies list), but I took away all named characters, agents and fleets.

So, I was all happy and ready to go, until I fired up the campaign, only to get a good old CTD. Now my question is: what exactly did I do wrong? Or better still: How in hell do I switch cities between factions without getting a CTD?

Thanks in advance,
Maion