I want to create a staging (testing) environment for a web server, but i'd also like to use the staging environment as an emergency failover. It seems like the best way to set up a passive failover server is to set up a cluster, in a Windows Ent 2008 environment. However, my understanding leads me to believe that both active and passive servers will cluster as one "instance," negating my ability to use the passive server as a test environment. Is this true? Does anyone have any recommendations on how to create a staging environment that might also fulfill some emergency failover requirements?