1. The files are in the archive. Unzip the file. You can use uzip or unrar etc
2.archiv contains files bzm (map) and lua (scripts for maps) These file into the
Nival Interactive / Blitzkrieg / Run / data / maps / multiplayer
Do not create a new folder in the "multiplayer"!!
3.Map still need dds files. The game is created automatically. When first using the map. Or create a game server. Because you have 1000 + maps will take a few minutes ... The following creation will be fast.