Booting HD without grub

[Eli Marmor]

Hi,

I have an old PC (with an old Mandrake), and its grub screwed up.
I want to boot it WITHOUT re-installing the grub (I don't want to touch the
HD till I see it works again, but boot it manually from a Live-CD/floppy).
How can I do it from a Live-CD or floppy?  (both work under this PC).
What Live-CD/floppy is recommended for this purpose?
Can I do it from the boot prompt?

Thanks,
Eli Marmor
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