How to set nemo as default instead of nautilus? [duplicate]

I have recently installed nemo with:

sudo apt-get install nemo

But I am finding that other applications still are using nautilus to open folders like for instance the Unity search still opens its search results and folders in nautilus. So is there any way that I can get it to use nemo as default (at least the search)?

OS Information:

Description:    Ubuntu 14.10
Release:    14.10

Package Information:

Nautilus:

nautilus:
  Installed: 1:3.10.1-0ubuntu15.1
  Candidate: 1:3.10.1-0ubuntu15.1
  Version table:
 *** 1:3.10.1-0ubuntu15.1 0
        500 http://gb.archive.ubuntu.com/ubuntu/ utopic-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:3.10.1-0ubuntu15 0
        500 http://gb.archive.ubuntu.com/ubuntu/ utopic/main amd64 Packages

Nemo:

nemo:
  Installed: 2.2.4-1
  Candidate: 2.2.4-1
  Version table:
 *** 2.2.4-1 0
        500 http://gb.archive.ubuntu.com/ubuntu/ utopic/universe amd64 Packages
        100 /var/lib/dpkg/status

Before changing defaults system-wide, you should thoroughly test something like a new file manager in one of your users first by adding nemo as the default file manager in the start-up applications...

One user:

Go to the dash, then type startup applications and add: by using nemo -n in the command.

Then disable Nautilus from drawing the desktop icons by executing:

gsettings set org.gnome.desktop.background show-desktop-icons false

Log out and log back in and you'll see two identical "files" icons in the unity launcher. Unlock the top one and lock the bottom one and move it to the top below the icon for the dash. Then allow nemo to draw the desktop icons for you:

gsettings set org.nemo.desktop show-desktop-icons true

All users:

Execute the following command:

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

and then edit /etc/mime.types and carefully review if nothing is left of nautilus. If it is, replace it by nemo.

reboot afterwards.