As i said previously, once you do this
jayoub (3/24/2014)
I would like to take these two servers off the network (disable the NIC)
You will not be able to do this
jayoub (3/24/2014)
Installing the Windows cluster and the two virtual instances on the new servers in Active/Active mode using the same names and IP addresses as the two old servers
A Windows Server Failover Cluster requires a DNS infrastructure and a Windows Server Active Directory domain. Once the servers are off the network they wont communicate with each other let alone a DNS primary zone or an AD catalog!!!!!
Also, i've installed SQL Server 2005 on a 2008 cluster previously and it's not pretty. There are a whole host of known issues with this, you'd be better off leaving it Windows 2003. Or move to Windows\SQL 2008.
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