Hi,
Follow this steps,
1)In your actual webdynpro component, create nodes i.e the nodes which you've created in your freely programmed search help component.
2)In you freely programmed search help component create the same nodes as interface nodes.
3) Now when you raise the event in your freely programmed search help component and catch that event in process_event of your actual webdynpro component, just read that node values using code wizard. Then you'll get the values which you've selected from freely programmed search help component into your actual webdynpro component.
Thanks
KH