Sounds like a good way to go. I can downgrade to beta12 and apply your recommended patch, as many details about how to install would be great too.
As this is a commercial environment, should I be testing another balancer, maybe loadbalancer for vmare (as my server runs vmware) or mikrotik.
I am also researching the best firewall solution and have been advised either pfsense or mikrotik, but to be honest I started with ZS as I thought it could do it all.