Once I enabled 'Extra' Visual Effects in the Appearance application (System --> Preferences --> Appearance), I went about installing the Emerald Theme Manager.
sudo apt-get install emerald compizconfig-settings-manager
I ran across the problem of the emerald-themes package not being available as well as Emerald no longer allowing you to download the GPL'ed themes.
I downloaded the package from here:
sudo dpkg -i emerald-themes_0.2.1-0ubuntu1_all.deb
The next step is to install the tray icon for Compiz Fusion.
sudo apt-get install fusion-icon
Next, go to Applications --> System Tools --> Compiz Fusion Icon. Right click on the blue cube next to your clock and go to 'Select Window Decorator' and choose 'Emerald'.
Once this is switched, go to System --> Preferences --> Sessions. In Startup Programs, click Add. In the Name field, type in Compiz Fusion Icon, and in the Command field, type in fusion-icon.
To access the Emerald Theme Manager, go to System --> Preferences --> Emerald Theme Manager.
I decided on rezlooks-pastelgreen-1pxb.