How do I set Nautilus as default file manager in Elementary OS

Question

Elementary OS uses a program called files as the default file manager.

I would like to use Nautilus as my default file manager as used in Ubuntu 12.04 . I have GNOME Nautilus 3.4.2 installed on my machine, but however the only way to invoke this file manager is using the terminal. How do I set this as default and have an icon in the application menu.

The Desktop Entry, nautilus.desktop looks like this.

[Desktop Entry]
Name=Files
Comment=Access and organize files
Exec=nautilus %U
Icon=system-file-manager
Terminal=false
Type=Application
StartupNotify=true
OnlyShowIn=GNOME;Unity;
Categories=GNOME;GTK;Utility;Core;
MimeType=inode/directory;application/x-gnome-saved-search;
X-GNOME-Bugzilla-Bugzilla=GNOME
X-GNOME-Bugzilla-Product=nautilus
X-GNOME-Bugzilla-Component=general
X-GNOME-Bugzilla-Version=3.4.2
Actions=Window;
X-Ubuntu-Gettext-Domain=nautilus

[Desktop Action Window]
Name=Open a New Window
Exec=nautilus
OnlyShowIn=Unity;

Edit: Updated the Desktop entry to get answer for adding Nautilus to Application menu.

Answer 1

eOS should support xdg-mime command which you can use to change the default file manager. Try these commands:

# what's the current default file manager?
xdg-mime query default inode/directory

# set nautilus as a default file manager
xdg-mime default nautilus.desktop inode/directory application/x-gnome-saved-search

Answer 2

To put the icon on the dock:

$ xdg-mime default nautilus.desktop inode/directory application/x-gnome-saved-search

Then:

$ nautilus

Once Nautilus opens, put the icon on the dock and delete the phanteaom icon.