With Ubuntu 9.10, GRUB 2 is installed by default as the boot loader (although it is still in beta version). The files and commands have been changed.
GRUB 2 settings can be viewed using the command:
sudo gedit /boot/grub/grub.cfg
(You can replace gedit with vim or whichever editor you prefer). This grub.cfg contains the menu entries but it is NOT recommended to change anything in this file. Infact, this file is compiled.
To alter the default menu item, timeout etc, open the grub file using the command:
sudo gedit /etc/default/grub
Make the required changes, for instance in my case I made you changes:
After making the changes, save the file and compile the output using the command:
Reboot and see the results!