Nevermine nirav. As for me,
~ Firstly I configure "jbpm-5.0.0\build.xml",
~ And then, configure "db\persistence.xml, db\hibernate.cfg.xml, db\testDS1-DS.xml",
~ And then, I also changed in "jbpm-5.0.0\lib\jbpm-5.0.0.bin.zip". Extract zip and there are seven jars. I configured the jbpm-human-task-5.0.0.jar like previous describe.
~ And then create a database in MySQL with name "jbpm" that described in persistence.xml.
~ I run and command with Ant "ant install.demo.mysql".
~ And also want to sugguest to reference "http://docs.jboss.org/jbpm/v5.0/userguide/ch02.html"