[Yskonyn]

Swan indeed, like DK said, all you need to do is delete WR 1.8(if you have that installed atm) download CBM from the link in the first post of this thread, install that, enable it in game and you're set.
I am not sure what you mean by a 'limit' on pretender names? As long as they're nothing offensive I'd say you can name him 'Snake on a Stick' if you wanted that.

Diplomacy will be diplomacy. I am in favour of roleplaying diplomacy a bit to add to the game. If you want to be known as 'Player X the Deceiver' after this game, be my guest.
But it's rather awkward if you have an alliance with someone to suddenly kill off all his troops, so in that respect, yes diplo is binding.
If you wanted to attack your ally later on, I think it would be normal to at least make it known to him/her prior to attack that you will not be allies anymore.
Roleplaying (lightly) or adding flavour to your texts in this case is a nice way to create a setting IMO. I'll update the first post to be a bit more clear on this.
Good question!