Before you take it the wrong way a I think that you have a really good idea in the fact that you are making a Napoleonic single-player mod for Mount and Blade Warband. What I am posting this for is the fact that you have so add or subtract a few factions from your factions list, in your factions list you have listed down the Duchy of Warsaw which during the Napoleonic wars was part of the Kingdom of Prussia, the Confederation of the Rhine or the Rhenish Confederacy was a grouping of South German kingdoms all joined in an alliance with France, which means that if you want an accurate retelling you will need to possibly split up these kingdoms and make them all just in the game but with an alliance with France that could possibly be done with the Diplomacy mod, just a suggestion and trust me I know this subject really well as I studied one of my ancestors who fought with the Austrians as a Major General so do not think about claiming I know nothing.