The best thing to do is go through the User Guide yourself that comes with the JBPM download.
Take note of Chapter 5, Deployment. It explains what you need to integrate the JBPM libraries into your own application.
There is also the Getting Started guide on the JBPM Wiki which will help you.
It will be easier to research JBPM yourself with the helpful documentation that's been put together already, then you can just post questions on sections you need help with. You will be more likely to get help on these forums doing it that way.