Ok, I've done it this time and I've done it right. It must have been the step 6 problem, there was no double mention of the cultures this time.

Now I wonder about two more things:
- In the settlement details the religious symbols for the breakdown of religious belief are missing. Any idea about that problem? (Remember, I modded 1.6, maybe that's the problem)
- The culture still stands as the Lombardi in most instances: in the chose culture screen, in-game on the map... can that be changed?

Sorry about the load of questions. I'll be trying to get at those issues myself, so I'm only asking to cut time in case you or someone else already knows the answers.