Please use the following link that will give you some idea how to configure jbpm outside jbpm installer:
https://community.jboss.org/people/bpmn2user/blog/2011/12/18/jbpm5-web-example--local-human-task
and https://community.jboss.org/people/bpmn2user/blog/2011/09/21/jbpm5-web-example
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