Thanks for the quick reply. So for the v4.07 medmod from wes's site, what files do I need to download and isntall and in what order?

I guess this invalidates my current campaign!

Another question, is it the case with all mods and all versions of the game, that when a faction's army is attacked and decides to 'retreat', that the army always retreats out of the province even if there is a castle that the army could retreat at least some of it's units to, thereby losing the province to the attacking faction? I have played XL mod quite a bit but I can't recall if that was the case with the XL mod.

Thanks