This mod should be relatively safe to add (and probably remove) during gameplay, with the following notes:

• Chivalry Bar bonuses would update to reflect the new bar only after a change in total Chivalry (fight a battle, recruit a Lord, etc.)
  
• Campaign chapters Chivalry objectives, despite visually updating, don't appear to change internally. You will have to wait for the next chapters (or start the campaign anew) for the increased values to take place.

This mod changes the chivalry values of Bretonnian technologies and buildings, so obviously mods that change the entire technology tree or remove those buildings are incompatible. Furthermore, for the purpose of campaign objectives, I had to edit one of the Bretonnia's script files, so mods modding that will also conflict.

I can look into specific mod compatibility and possibly even make an appropriate submod, by popular request.