I have verified that if I start with a virgin Ganymede (Eclipse 3.4) installation and install Drools 5M3, and then try to install 4.07 from update site, I cannot go back and trying to manipulate the plugins and features manually will destroy the ability of the Eclipse distribution to ever expose Drools. Also found that my previous problem (probably obvious) is that the entire binary needs to be used as the runtime environment. I just put it in as a plugin so it is conveniently located. - Mike