This is only textures change to the armor of the excellent Ekmek's Constantine leader. The zip contain dds textures. You have to replace your favorite texture over the one in the original Constantine's file.
You can find the original file here :
http://forums.civfanatics.com/downloads.php?do=file&id=8812
You can find the original file here :
http://forums.civfanatics.com/downloads.php?do=file&id=8812