[syslog-ng] how can I change the priority/facility of a log entry?

Hello All, I have spent hours looking for this. Is there a way, using syslog-ng to re-write an incoming log entry's priority/facility. We have some windows boxen that we are logging but the log entries need a little massaging. Any ideas would be helpful. TIA -- Dave Augustus <davea@support.kcm.org>