You can delete the real folders (Video, Music, Photos, Documents - not the others ) an replace them with the Alias.
iTunes, you can either just delete your current library and drag the new folder into iTunes or move the library via iTunes -> Preferences -> Advanced and change the Library location.
Thanks
But ive just trid to delete the original Music / Movies / pictures within home.
But it wont allow me telling me ' ''Movies'' can't be modified or deleted because its requird by Mac OS X'