You need to edit /boot/grub/menu.list, so on GNOME gksudo gedit /boot/grub/menu.list or on KDE kdesu kate /boot/grub/menu.list
Then you'll find the lines he's talking about
You need to edit /boot/grub/ menu.list, so on GNOME menu.list menu.list
gksudo gedit /boot/grub/
or on KDE
kdesu kate /boot/grub/
Then you'll find the lines he's talking about