Installing Drools Planner in Eclipse
===

I am almost a newbie in Java technologies (exluding programming foundation at school). But I am interested in NP problems and I want to have a look into Drools Planner.

So I am trying to install Drool Planner following [this tutorial](http://docs.jboss.org/drools/release/5.4.0.Final/droolsjbpm-introduction-docs/html_single/index.html#d0e95).

Steps:

 - Eclipse (at least 3.4.*): done, version: 3.4.2 already installed in
   my computer (Windows XP PRO, ok, it's my old good donkey).
 - GEF: done
 - Drool plugins: FAILED.

I have downloaded and unzipped the archive into my Eclipse root directory. The tutorial states that restarting Eclipse after unzipping the archive in the proper directory should have enabled Drools Perspective.

But no Drools perspective is available.
Where am I wrong?
