My mistake, should be explained it a little bit in detail.
I had a laptop that comes with a default OS (hda1) and later installed Debian on a separate partition (hda2).
As my current clients had voice out their wishes to see only the default OS on our laptops when working with them (not negotiable). I had reinstalled the default OS overriding the MBR.
The intent is to boot normally into the default OS when with these clients.
I've a spare 64M usb thumb drive and is looking into the possibility to just install grub onto it. I do not want to install an entire distro into it since I already had Debian in hda2
The intent is to insert USB thumb drive and boot into grub and select from menu what I really like to boot when NOT with these clients
Oops, I've yet to look into the links that you've provide