Here you will find a whole forum section dedicated to the mod that will make RTW more realistic.
RTR VII is a series of mods that focuses on the Western Mediterranean from Iberia to Asia Minor. It includes unique features, stunning graphics, and in depth history to give the player an amazing experience.
This RTRPE-based mod is designed to provide a more challenging experience utilizing BI gameplay options and a complete readjustment of building costs/times. You'll also find a number of new AoR units, three additional factions, and a long list of add-ons and optimizations.
Rome Total Realism 6 Platinum Edition (RTR PE) is a community based conversion of Rome Total Realism 6 Gold (RTR Gold) for use with the Rome - Total War (RTW) v1.5 game engine.
Fortuna Orbis is a mod based on RTR which aims to provide a game to the standard of RTR-VII on a full map, stretching from Britain to India, with high quality units, a fully-fledged Indian faction, and other innovations.