You don't have to install it. You just have to unzip the files in one of your hard drive's folders and then you can run it without a problem (even though you need Java).
To start using it, you just have to write the exact name of the element that you want to edit, chose an appropriate category, and search. You will quickly receive the existing results of the different versions in Wikipedia.
Wikipedia Bio References is a tool destined for a very specific audience, since only users that edit Wikipedia articles on a regular basis will find it useful.
You need to have Java 1.5 or greater installed.