Go here ( LINK ) it is a thread with pictures for the installation, and these steps are the ones you need to do:
1) Edit Security for your main M2TW folder ( Or, use the TakeOwnership.reg method), unhide hidden folders, and, check VirtualStore folder for:
Program Files or Program Files(x86)/Medieval 2 Total War folder, and, delete Medieval 2 Total War folder if you find it there!
2) Then, remove/delete Third Age TW files which you already installed in your main M2TW/ mods folder ( just delete Third_Age_3 folder ).
3)
a) open your main M2TW folder, right mouse click in the Address Bar and press: Copy address as text.
b) replace the Default Installation path in ALL TATW Installers with this one you have just copied ( Copy address as text ):
just select the Default installation path, right mouse click and press PASTE to replace it with the location of YOUR main M2TW Folder .
4) For battle Crashes Disable/turn off daylight saving settings, if you have Windows 7 or Vista, go to Control Panel, Clock, Date and Time, Change the time zone, Change time zone, uncheck `Automatically adjust clock for Daylight Savings time`. Apply and OK. For Windows 8: http://www.eightforums.com/tutorials...ndows-8-a.html
At the end, if you wish to play vanilla TATW 3.2 only, without submods installed, then install these bugfixes as well: http://www.twcenter.net/forums/showt...1#post14533296
Good luck!