American Civil War Version 2 : Librairies Version Windows and Linux.

ACW is the biggest mod of all time, 65 maps western. 6 campaigns, download free ACW-Final.zip.

Installing ACW :
Unzip ACW-2.zip into the folder users/public, and a new folder ACW-2 now.
Open main, creat (if have not) a shortcut on et.exe and add parameters + exec server.cfg + set com_hunkMegs 512.
Example ("C:\Users\Public\ACW\et.exe" + exec server.cfg + set com_hunkMegs 512) and that's all.
Run the shortcut to play ACW.