Ubuntulooks Engine is a GTK theme engine that was first used by Ubuntu.
GNOME is an international effort to build a complete desktop environment-the graphical user interface which sits on top of a computer operating system-entirely from free software. This goal includes creating software development frameworks, selecting application software for the desktop, and working on the programs which manage application launching, file handling, and window and task management.
GNOME is part of the GNU Project and can be used with various Unix-like operating systems, most notably Linux, and as part of Java Desktop System in Solaris.
The name originally stood for GNU Network Object Model Environment, though this acronym is deprecated. The GNOME project puts heavy emphasis on simplicity, usability, and making things "just work".
Copy libubuntulooks.so and libubuntulooks.la to /usr/lib/gtk-2.0/2.*.*/engines as root (substitute "2.*.*" with your version number)
Copy the Human folder to /usr/share/themes/ as root (or to ~/.themes , but it will only be on your account)
Go into your Gnome Theme Preferences and select Human (or any other Ubuntulooks enabled GTK theme, Human is just included as an example) as your theme under Controls and Window Border. The metacity theme used on Human is a modified version of ClearLooks 2.0 if you wonder, but any other will do too!