How do I add gwt 2.5.1-rc1 to eclipse?

I have eclipse EE  with gwt 2.5.0 (downloaded 2 days ago). Now I have downloaded gwt 2.5.1-rc1 and unzipped into into a folder (GWT updates).

However, I have no clue as to how to incorporate this new download into eclipse.  The Help > Add new software appears (to me) to be geared toward full release download "websites" (like gwt 2.5.0).

Please point me toward some documentation to achieve this final step.  I have been unable to find anything that is helpful - and I am sure all I need is a very simple final step!!

[Sidenote:  I am using Java 7.x and I'm hoping this new download (gwt 2.5.1-rc1) will allow me to run the Starter app (StockWatcher).  This hope is based on reading the release notes for this new release candidate.

--
You received this message because you are subscribed to the Google Groups "Google Web Toolkit" group.
To unsubscribe from this group and stop receiving emails from it, send an email to google-web-toolkit+unsubscribe@googlegroups.com.
To post to this group, send email to google-web-toolkit@googlegroups.com.
Visit this group at http://groups.google.com/group/google-web-toolkit?hl=en.
For more options, visit https://groups.google.com/groups/opt_out.