Q: How to add Windows entry into GRUB menu?

1. Read General Notes
2. Read How to list partition tables?

3. e.g. Assumed that /dev/hda1 is the location of Windows partition

4. sudo cp /boot/grub/menu.lst /boot/grub/menu.lst_backup
   sudo gedit /boot/grub/menu.lst

5. Append the following lines at the end of file

   title		Microsoft Windows
   root		(hd0,0)
   savedefault
   makeactive
   chainloader	+1

6. Save the edited file (sample)