bb-msgstab? 🔗 link

is there a way to make the bb-msgstab file use the syslog-ng style of directory structure so specifying somthing like 
<hostname>: /var/log/<hostname>/<year>/<month>/<day>/<logfile>:
So that i can run the test on a syslog-ng server for multiple hosts without having the hosts do local logging.
Thanks