Best way to remove fedora 4 but keep grub safe?

[Kahn Seidl]

Sorry I have never done this before.  But what as the listknows
I had problems with fc3, so I installed fc4 onto another partition, but now 
that fc3 is fixed, I dont want fc4 anymore.  But, if I trash /dev/hda3 which 
is what fc4 is on, how will grub be affected?  grub is also with fc3, which 
has a seperate boot partition.

SHould I reinstall grub on fc3 and THEN trash fc4?

thanks,

martin