[otrs] SQL cleanup script

In time I could do this myself but I was wondering if anyone had written a cleanup script for the OTRS database. After the mail, users, etc are set up we have a testing cycle. After that testing it would be nice to be able to clear all the cases from the system, leaving the core user and setup data intact. If anyone has a scrub script or could give some guidelines on what can/should be deleted by force it would be great. CT