replace grub (not grub2)

[Mike Wright]

Hi all,

I have two different boot drives, one occupied by f18 and one by f14.

f18 uses grub2.
f14 used grub.

When I installed f18 xen it replaced grub with grub2 on the f14 system. 
  Needless to say, my f14 xen system is no longer bootable.

I want to reinstall grub and its MBR but grub-install is no longer 
available in f18: replaced by grub2.

Searches on this return ancient results, most of which refer to DOS and 
Windows.

What is the "modern" way to return the MBR to the old fashioned grub 
boot loader?

Thanks for any help,
Mike Wright

(making me laugh here: i remember lilo and thought it would be the death 
of me)
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Every step forward comes from one foot in the past.