That reminds me of another point from above. As long as your current dhcp server is not sending out dhcp options 66 and 67 or you don’t have altiris current on that subnet, you can setup dnsmasq to supply the missing dhcp information without touching your managed dhcp server. If you do have altiris or current dhcp options 66 and 67 on your main business network then your isolated network is the best choice for this install. You can setup the FOG server to act as the dhcp and dns server for your deployment network.