I played a bit with the editors and made a new companion with conversations and edited certain existing characters to make interactions with him.
When you see this guy in taverns, you find him:
This pack also contains all of the modified companions I made earlier and some new details.
It is better to make a new folder in Modules and put there the content of Ogniem i Miezcem. Than overwrite those with my files. This way your original game is still present and you avoid confusions.
The new dialog entries may cause problems in non-English versions.
If you wouldnt mind, you might want to mention that my mod is not supported on the current version, and Im not working on it anymore because Im doing another mod for this game right now, it will have most of the features from that mod in it.