ok i see the goodies but this leads to a compressed folder ... containing redkit.
extracted it to:
C:\Program Files (x86)\GOG Galaxy\Games\thewitcher2 but
redkit isnt selectible in the witcher 2 launcher. shes greyed out.
havent tried just running the redkit .exe.. paranoid i may break something or some such.
Extracting it to the Galaxy installation folder is not the way to install it. Move that folder to its own location, somewhere like C:\Games\Witcher2\<REDKIT FOLDER>
Then you need to make a shortcut of the executable (right click >> Send To Desktop as Shortcut). Run that.