I don't have .exe file in my Beta 5

[Gunfreak]

I only have some folders, the credits thing and the uninstall.
Noe executable.

[Aneirin]

In which directory did you place the installation?

[Gunfreak]

C:\Program Files (x86)\Steam\steamapps\common\Medieval II Total War\mods

[Aneirin]

All right, so you have a folder named 'Italian_Wars'. Inside you have the following things:
data
GHZ
maps
Original
packs
preferences
saves
credits.txt
DIK.cfg
Excutable
GHZ_Texte
GHZ_Texte_back
Icon