NSIS, add folder to output path

As known that we can add file by:

SetOutPath "$INSTDIR\readme"
File "Readme.txt"

How do I add a folder that contains sub-folders and files to the output path? Thanks

File /r "folder"

-Stu

Stu, thank you sooooo much !!!

Great, needed that, now about creating a folder

That was also what I needed. Now about how to create an empty folder?