Hi Souvik, as far as I know the wars you need are
designer+guvnor
drools-guvnor.war
designer.war
console front end
jbpm-gwt-console.war
building forms
jbpm-form-builder.war
process and task services
jbpm-gwt-console-server.war
jbpm-human-task-war.war
IMHO the best documentation right now for configuring, assembling and deploying is the ant script at the root of jbpm-5.3.0.Final-installer-full.zip.