1) use NMM , or download manually.
2) activating the mod in NMM or extracting the archive to the FO4 data folder.
3) make sure you have the following lines to your "Fallout4Custom.ini"

[Archive]
bInvalidateOlderFiles=1
sResourceDataDirsFinal=

3) Make sure your NMM do actually load the esp right. If not, check this article for how[/spoiler]

Wie bekomme ich die Kleidung im Spiel?
[spoiler]1) in console, type "help zwg 4", and you will get the item codes.
2) in console, type "player.additem [item code in (1), do not include brackets]"

Alt) get via item codes, but you need to replace xx to your mod load order in hex code
"player.additem xx087001" for the top dress with pants
"player.additem xx087002" for the skirt
"player.additem xx087003" for the boots
"player.additem xx087103" for the top dress with pants in black texture
"player.additem xx087104" for the skirt in black texture