Help Me Manualy Pool My Movies Folder!

Hi,

I currently running 4 HDD  whs2011 box.

HDD1 is for Music, HDD2 TVShows, HDD3 pictures and HDD4 for Movies.
I don't use a drive letter, but instead hdds are mounted directly as D:\ServerFolders\xxx.

Now, I need to add a second harddrive for movies.

I'd like all movies from both disks to be gathered in the single D:\ServerFolders\Movies directory.

If I make a script to add/update symlinks in D:\Serverfolers\Movies for each movie folder in HDD4 or HDD5, will it work?
And what about network sharing permissions?

Do I need to edit manualy for each linked folder? (or copy it with the script)

And if i copy a file in D:\ServerFolders\Movies, what happens?

I know that many pooling solution exists, but i don't trust them for my data and prefer to keep OS and filesystem as untouched as possible.

Thanks