When you make a Virtual Server deployment, make sure that you follow Microsoft’s recommended Best practices for Virtual Server. They can improve the performance of Virtual Server installations, and make your life as a system administrator easier.
One important thing that many people overlook when creating multiple VMs is the importance of using Sysprep. I wrote a quick walkthrough here, and you can find documentation on Microsoft’s website about it as well. Sysprep makes sure that each cloned virtual machine will be unique – not using it may introduce security and performance issues in your network.