The Windows Vista Service Pack 1 management tools for the Hyper-V release candidate are now available. This update package installs the Hyper-V remote management tools on a computer that is running Windows Vista Service Pack 1 (SP1). This package includes the following:
•The Hyper-V Manager. The Hyper-V Manager is a Microsoft Management Console (MMC) snap-in that provides management access to a Windows Server 2008-based server that uses the Hyper-V role.
•The Virtual Machine Connection. The Virtual Machine Connection is a remote connection tool that you can use to establish an interactive session on a virtual machine
More Information: http://support.microsoft.com/kb/949758