You typically need three core installers: Part 1 of 2 , Part 2 of 2 , and the 3.2 Patch .
TATW 3.2 serves as a base for massive sub-mods like Divide and Conquer (DaC) or Massive Overhaul Submod (MOS) , which add even more factions and refined mechanics. medieval-2-total-war-kingdoms-1.5-third-age-3.2...
It is highly recommended to apply a 4GB patch (or "Large Address Aware" tool) to the medieval2.exe and kingdoms.exe files to prevent crashes during large battles. You typically need three core installers: Part 1