1) use the latest-version NMM , or download manually (remember you must have CBBE installed)
2) activating the mod in NMM or extracting the archive to the FO4 data folder if manually.
3) remember to update your fallout.ini and Fallout4Custom.ini for loading customized content

PS1: there is a good tutorial about FO4 mod installation, checking it if you don't know how.[/spoiler]

Wie bekomme ich die Kleidung im Spiel?
[spoiler]1) in console, type "help simply 4", and you will get the item codes.
2) in console, type "player.additem [item code in (1), do not include brackets]"
x) or try & error on "player.additem xx00080A" to get the outfit
(xx start from 01 in hex character, depending on mod loading sequence)