For testing and presentation puropuses I have installed inside my full Windows server 2008 64 BIT installation with Hyper-V another standalone Microsoft Hyper-V Server 2008 - everything works - you can even manage it using Hyper-V manager from other server but you can not (obviously! :)) run virtual machines. You get an error saying unable to [...]

Read the complete post at http://luka.manojlovic.net/2008/10/16/hyper-v-in-hyper-v/