For ACOK 4.1 Some changes to items were made as well, if you want them (the "mod" works without them), just replace the file with the one provided.
Edited almost all factions! HBO didn't show us much of the free cities armies so I had to be creative!
Heavily Modified Factions:
The Reach, The Westerlands, The Stormlands, Targaryens, Qohor, The Vale, Lorath, Myr, Lys, Dorne.
The Riverlands, The North, Dragonstone, Volantis, Tyrosh,
Slightly Modified Factions:
Ironborns, Pentos, Norvos, Bandits/Outlaws/Pirates.
Changed all Castle and Prison Guards, Special Troops (the ones you recruit in the cities) and some lords stats and equipments as well.
New Special Troops include The Driftmark Marines (in place of Driftmark Spearmen)
Added spearmen for Dragonstone (bye bye halberdiers) and Westerlands (with kite shield like in the show).
Changed some items stats and abundancy.
Changed npc equipments of some quests.
Rebuffed stats for Bandits in lairs (they were too strong in my opinion) and for all factions rosters.
NOTE: FOR THE NEW LORDS STATS AND EQUIPMENTS YOU HAVE TO START A NEW GAME! OTHERWISE YOU WILL ONLY GET THE TROOPS CHANGES.