Multisite in 9.05.700C SQL

Anyone using Multisite in 9.05.700C SQL. Looking at it as way for our plant to stay running if the network connection to corporate goes down. Would like to know what works and what doesn't. Sounds like I need another server like corporate in the plant.
How does the Epicor license stuff work, does it have it's own or do I put the same license on both servers?