My co-worker Chris Avis just did a blog post about how to clean up your boot loader. In the West IT camps they are passing out a VHD file that people can use to test the new features of Private Cloud. It is easy to use bcdedit to add an option to boot to a vhd file.
But undoing this is another story. He has gotten several emails asking for help in cleaning this up, so he wrote this blog post: http://blogs.technet.com/b/chrisavis/archive/2012/03/20/it-campers-how-to-clean-up-your-boot-loader-entries-with-visualbcd.aspx
In this post he uses a 3rd party tool called Visual BCD Editor.
I know this will come in useful if you ever need to “Undo” some of the things you change with the boot record.
Our IT camps are coming to Texas in May, so sign up at www.technetevents.com before they fill up!