Old Demo release, don't download, for archive purposes only.
First Age, Third Age, and Fourth Age Main Campaigns along with many Custom Campaigns. Second Age is currently unplayable. Everything needed is located in the installers folder, anything outside of that folder is optional.
For installation on Kingdoms 1.5 and an unmodified version of TATW 3.2. Requires an additional 10.5 GB of HD space (requires 15.5 GB total when installed over TATW).
First (not after!) install the File Cleaner into "Sega/M2TW/Mods/" folder, then find the "FILE CLEANER" file in your Third_Age_3/data folder and run it (double-click it). If you cannot find it you installed it in the wrong place, try again. Run the File Cleaner first or there will be some bugs as a result.
After that install PCP 9.5 DS Part 1 and 2 (the order doesn't matter) into "Sega/M2TW/Mods/" folder (same place), install any updates next. Launch your game as you normally would.
Manual Install (and Steam);
Install the File Cleaner to your desktop and copy/paste the data folder over your TATW data folder to run it, after running it install Part 1 and 2 to your desktop and copy/paste the data folder again. Launch your game as you normally would.
OPTIONAL Enb Series;
Install Graphics and Lighting Tweaks v1 to SEGA folder (NOT your TATW folder) and run the game or any mod as usual (works with everything). After the game menu has finished loading hold SHIFT and press F12 at any time to enable/disable the tweaks. This was designed for use in battles only, it will work on the strat map but strat map lighting is far simpler so its probably best to toggle it off (SHIFT+F12).
OPTIONAL Hotseat/Multiple Factions Campaigns;
All campaigns are Hotseat compatible. Paste the following code into your TATW.cfg file (over any pre-existing "[hotseat]" section) to fight all battles in Hotseat Campaigns. Without it you will have to auto resolve defensive battles. Do this before you start your campaign and make the TATW.cfg file Read Only. This is not save game compatible as far as I know. Do not disable console, many scripts use it.
Paste the following code into the pre-existing [hotseat] section or make one;
autoresolve_battles = 0
disable_c />disable papal_electi />save_prefs = 1
update_ai_camera = 1
validate_diplomacy = 1
turns = false
scroll = false
OPTIONAL File Swapping;
First Age is set to default in this upload so this is not needed for that other than playing one of the custom campaigns as a Hotseat campaign. Add the .bat launchers/File Swappers to your mod folder (they may need to be told where they were put, I have no idea what your folder is named, Third_Age_PCP is what I have it named in the path) and LAUNCH THE GAME WITH ONE whenever you switch to and from the First Age which uses different files, otherwise you need two or more mod folders of TATW. Be sure to state that you are not playing the First Age if you give feedback on other Ages or you will just break all of them with misleading info.
*Try this to set them up if they do not work;
1)Rename your Third_Age_3 folder to Third_Age_PCP
2)Open TATW.cfg in notepad and replace Third_Age_3 entry in line 3 with Third_Age_PCP
*Then this if the above doesn't work;
If it can't find kingdoms.exe, very likely you don't have that file. Have a look inside the main directory "Medieval Total War II" (or wherever it is installed the main game). If I remember well, After one of the last patches, the file "medieval2.exe" should launch Kingdoms.If you have only the "medieval2.exe, replace "kingdoms.exe" in TATW.cfg with "medieval2.exe".
*Note; I did not write the above, this is what other people did to get it working.