From Russian forum:
Installing.
1. The Mod is installed over M2TW Kingdoms version 1.5
2. Unzip the archive with the Mod, launch the installer (file with extention EXE) and install the Mode into the folder
Medieval II Total War\mods\
3. Get sure that there has appeared a new folder
Call_of_Warhammer in the folder mods!!! If it is not there, search for it in the folder \Program Files, maybe the path of installment was given in a wrong way. When you find it, drag the folder
Call_of_Warhammer int your folder
Medieval II Total War\mods\ . In this case you will also need to edit the path in the tag into correcnt one.
5. The mod is started by the shortcut on the desktop, or by the file
\mods\Call_of_Warhammer\warhammer.bat
6. Play.
I'm pretty sure it's standalone
EDIT:
If you have to download in small parts, I recommend ones below mirror4, you can download simultaneously multiple files, no waiting time, and good speed, atleast for me.