I want to run more then one mod civ at a time like Israel and Iraq. So how do I put them into the core game? Thanks alot:)

1. copy the civs into the *Mod*\Assets\Modules\Custom Civilizations\[civ] directory
2. in the civ4 config file look up "ModularLoading = 0" and set the value to 1

Or just copy the relavent sections of the mod into the XML files in your assets