How to install SOA/BRMS tooling plugins for JBDS 6 ?

Issue

• The following compilation errors can be seen when a sample jBPM 5 project "Hello World" is created in JBDS 6 with SOA/BRMS tooling plugin following this guide.

http://www.schabell.org/2013/04/jboss-developer-studio-6-how-to-setup.html

The import org.drools.core.runtime cannot be resolved
The import org.kie cannot be resolved
...