Updating zones

[Ryan McCain]

I have 3 zones that all point to a shared.zone file via $INCLUDE.  When I add a new DNS record to shared.zone I now have to:

1) Update the reverse zone
2) Update the serial # in zone1
3) Update the serial # in zone2
4) Update the serial # in zone3

Is there a tool/script that helps automate this? 

Thanks..