The installer is the recommended option for most people.
It will install the full game if you do not have it, and it can patch an existing game installation.
This installer includes all the game components below

Game Downloads

Crysis Wars Launcher
Crysis Wars Trial Version
Crysis Wars Patch 5
Crysis.exe Replacement
Falcon Mod
Crysis Wars Loadout Manager
Sandbox 2 Editor
CryNetwork.dll Patch (Included in replacement exe)

Server Files

Crysis Wars Dedicated Server Documentation
FalconServer Mod
Falcon + SSM Patriot Server Files

Mod SDK Files

Crysis Wars Mod SDK Source Code
Crysis Wars Mod SDK SP Mod
Crysis Wars Mod SDK Tools