Its a Work in Progress; some errors can occur when going through turns but here is a simple overview of what's been done:
Initially, I tried to make it as accurate as the EpicHistoryTV series on Napoleon but later on with many hiatus, I decided to push with whatever I had. For the most part, it is accurate to a degree but knowing some limitations of the game itself, it's a little difficult to maneuver.

Also in this mod, I've made Great Britain more "on the sidelines" rather than a direct involvement of superpower because of how OP I've made but the AI itself in the campaign will stay neutral and will not get into wars/alliances nor move the current units on the map (tested).

This is been off and on for ~7 years now in editing and testing for me.. No hybrid-startpos method was used for this. Just because I like the initially Lua camera scripting for the campaign. So you still see the camera pan and the female advisor talking to you when you start the campaign.

What's been done:
1. All Nation's faction leaders and Faction's governmental bodies (except emergents) have been replaced by more accurate portraits with filled character attributes appropriately (except Great Britain whereas every leader has been given OP traits and traits only available to special characters and to special factions)
2. Great Britain has OP units like HMS Elephant which will annihilate everything in Sea Battle (see pictures below) - your FPS will suffer based on the amount of the projectiles it shoots and how strong each one is. Also special land units given to GB with Stats OP.  You cannot recruit these units again, make sure you protect and put them in the rear as required.
3. GB gained Corsica as inherent territory in the start of the campaign. All building upgraded to max for GB.
4. Generals and units for nearly all factions (excluding emergent factions) has been accurately portrayed and units limited. Units are "limited" by that there is no specialized units for each factions as in the regular NTW but some Generals will have specialized units just like GB but not OP. Every Faction will have 6/9/12 lber artillery, foot musket, militia, dragoons, light horse, cuirassier, lancer (all typical same class of units) 
5. Overhauled Diplomacy in the campaign; where GB is seen as very friendly and neutral to all nations (from both sides). But diplomacy was changed in terms of accuracy (see in game).
6. Starting territories have changed.. Also Riga (Modern-day Lativa), there is a rebellion of Scots against the Russians so game may show them getting defeated or in succeeding into creating Scotland in Riga.
7. Skirmish mode, I added all the factions to be chosen and played as wanted by player. Unfortunately, some of the factions wont show below the list due to how hard-coded the game is and can't figure out to make a drop down scrolling. All Nations including emergent are available to play in Land, Siege and Sea 
8. All Units Morale for all Factions have changed to very very very high number. This means that there will be NO MORE ROUTS. All Units will stay put and die until the last man is alive.
9. Projectile data and other weapons stats and movement/movement points have been edited for some units; many are left vanilla for balance.
....

Alot more has been done that I will add to the description later. Please see some of the pictures to give you a idea of what this mod consist of.

This is a work-in-progress mod and will update it continously.

Credit goes to Portrait mod author as I used his many of his portraits and nation's flag.