1.Do the following changes in Grub file
a. Write the path where the grub file is located.
b. Change the timeout and title of the system


a. The path of grub file is :
  /boot/grub/grub.conf

b. Open the file manually or through vi editor (vi /boot/grub/grub.conf)

It will be like this :
default=0
timeout=10
splashimage=(hd0,0)/grub/splash.xpm.gz

# section to load Linux
title Red Hat Enterprise Linux (2.4.21-1.ent)
        root (hd0,0)
        kernel /vmlinuz-2.4.21-1 ro root=/dev/sda2
        initrd /initrd-2.4.21-1.img

# section to load Windows
title Windows
        rootnoverify (hd0,0)
        chainloader +1

Now search for timeout and title and change its values
for eg :
default=0
timeout=30
splashimage=(hd0,0)/grub/splash.xpm.gz

# section to load Linux
title My Red Hat Linux
        root (hd0,0)
        kernel /vmlinuz-2.4.21-1 ro root=/dev/sda2
        initrd /initrd-2.4.21-1.img

# section to load Windows
title Windows
        rootnoverify (hd0,0)
        chainloader +1

Save and exit