Get an old version
The principe of getting an old OpenEmbeDD release to work with is the same than recent ones: you should get an old Eclipse version free of any extra plug-ins and make an update from the old OpenEmbeDD update site.
The complete informations and links to do that can be found in the update page of this particular release in the OpenEmbeDD old versions repository, which can be browse at http://openembedd.org/oldreleases/.
As this directory gathers a simple copy of each release update site, you will find under each version directory the exact informations and files you got on update site when this release was the official current one.