First open the ordner named blockland and start the blockland .exe
second you should make 1 ordner on the desktop named BlocklandMaps
there should be a ordner named maps and in this ordner should be the downloadet map.
Now start Blockland and start a game, press Alt+F4 and there will come up and window where you should find your map.
Have Fun.
Ordner (german) = Folder (english)
Downloadet (unknown) = Downloaded (english)
Tach auch^^ :P
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If a map is downloaded from a server you won't be able to use it inside of blockland, you have to download them from the maps area inside this board.
In most cases you just have to extract the .zip or .rar DIRECTLY into the Blockland installation folder, (for example C:\Program Files\Blockland) but I would suggest that you first look inside the zip or rar, sometimes people don't insert the right folder structure, in this case, help yourself an put the files with the following .extensions inside [Blockland-InstallationFolder]\base\data\missions\ :
.jpg
.mis
.ter
.dif