Here is a tool which makes it easy to add network locations to Windows 7 libraries and also has a few other features as well:

* Add network (UNC or mapped drive) and any other un-indexed folders to libraries.

* Backup library configuration, in a way that a saved set of libraries can be instantly restored at any point.

* Create a mirror of all libraries (using symbolic links) in [SystemDrive]:\libraries. This means you can reference all your files using a much shorter path, and also provides another entry-point to your files in many places in the Operating System (e.g. file open/save dialogs).

* Change a library’s icon.

Visit Win7 Library Tool Zorn Software