STEPS:

# Open a command prompt (called a ''Linux shell'') by selecting '''APPLICATIONS''' -> '''ACCESSORIES''' -> '''TERMINAL'''

# In the terminal, issue the command: '''sudo su''' (this will give administrator priviledges - assuming your have these priviledges, enter your account password)

# Issue the command: '''cp /boot/grub/menu.lst /boot/grub/menu.bk''' (just making a backup copy...)

# Issue the command: '''gedit /boot/grub/menu.lst''' (this opens the file in gedit application to allow you to make changes)