I'm aware that the jBPM process engine is embedded in Alfresco. How thight is it embedded into the Alresco core? Is it possible to install the jBPM engine on a separate free standing server. The reason I ask is that I'm working on a technical architecture blueprint, where a PBM engine is required for other areas than in an ECM context only. Alfresco is the solution building block for ECM in this arhitecture.