If you already have your machine set to dual-boot, you'll be familiar with
the screen that appears when you start the computer, which asks you which OS
to start. Under Windows 7, you can edit the details on that screen by using
the msconfig utility (from the Start button, type msconfig into the search
box and then, when it loads, look at the Boot tab). But although this lets
you change the delay timer from the default 30 seconds, and also allows you
to change the default OS that will be loaded when time runs out, it won't let
you change the name of the installed operating systems. So you're still, for
example, stuck with Windows 7 and, er, Windows 7. The official Microsoft way
to change these is with a command-line tool called bcdedit, but it's fiddly
and complicated. Much easier to use this excellent Windows app, which is free
for non-commercial use. Once you've downloaded it and installed, click on
Edit Boot Menu and amend your dual boot settings as you wish.
http://www.techsupportalert.com/content/manage-your-dual-boot-entries-easily.htm
