Emerald Install with LMDE x64

install the key and repo, go into Synaptic and install Emerald. I comment out the repo after install:

deb http://download.tuxfamily.org/shames/debian-sid/desktopfx/unstable/ ./ wget http://download.tuxfamily.org/shames/A42A6CF5.gpg -O- | apt-key add -

To make it stick at every login: Go into Compiz Settings|Window Decoration and set the window manager to /usr/bin/emerald. Log out, log back in and you'll be greeted with a gorgeous default Emerald desktop.

HTH