Trying to give something back to the Community...
Microsoft has now released a pre-configured VHD for ConfigMgr 2012 Beta 2 which you can download at:
Bear in mind that this is 10 GB ish in size (although Microsoft has divided it into chunks), and remember this is a Beta so don’t go installing it in your Production environment. Have Fun…!!!
This download comes as a pre-configured Virtual Hard Disk (VHD). It enables you to evaluate System Center Configuration Manager 2012 Beta 2 on Windows Server 2008 R2.
Read the complete post at http://wmug.co.uk/blogs/cliffs_blog/archive/2011/06/13/configmgr-2012-beta-vhd-now-available-for-download.aspx