I just want to be on a fast track : going through all those manuals just to get what i want is a tedious work considering i am messaging from a mobile.
Just to "fast track"
your request - and assuming you know all the other things you should understand before
you dither with your BOOT.INI
is what the link Ath provided you with
has to say about it:
FreeDOS can be booted from a hard drive, live CD, USB flash drive or floppy disk. It can also be run using virtualization software like Virtual PC and VirtualBox or emulation software like Bochs and QEMU.
To use the Windows Boot Menu the following line can be added to 2K/XP's C:\BOOT.INI:
To boot using GRUB something similar to the following can be added to menu.lst:
title FreeDOS # Anything you want
root hd(x,y) # x = device and y = partition on which FreeDOS resides
chainloader /kernel.sys # Boots FreeDOS's bootloader