At home I share my machine with my friend who are die hard fan of windows. I have windows as well as Ubuntu on same system. So for my friend’s convenience, I set windows is the Default boot OS in grub.
But after updating Ubuntu to version 10.10, I unable to change my default boot option cause there was no /etc/grub/menu.lst file, which I used to modify for default boot option.
After searching little bit, I got startupmanager. With the help of Startupmanager you can change your boot options easily.
First you need to install Startupmanager, to install run,
sudo apt-get install startupmanager
How to use
Go to System > Administration > Startupmanager
- In the Startup Manager window, you’ll see Boot options tab
- Just click on Default operating system option and choose the OS you want to load as default boot at the time of booting.
- Click on Close button, statrtup manager will perform post configuratin task.
Voila, Now whenever you restart your machine it will boot in Windows by default. Now on no need to manually change grub options. A beginner user can also change grub settings with just a few clicks.
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My name is Vidyadhar Sarmalkar & I work as a consultant and have done RHCE & CCNA. 
I dont have windows in the list of boot options
Great! works well, thanks man.