How can I clean GRUB so my new install will boot?

[sdavmor]

I'm trying to finish a RAID+LPV server install of Dapper Drake. It
fails at the point where it wants to install LILO. So I proceed to
finish without intalling LILO. Then when I reboot the old GRUB (from
the Linux install that used to be on these drives) activates and bombs
out.

Has anyone else encountered this? The failure message I get at the end
of the server install at the 75% marker is:

LILO installation failed
Running "/sbin/lilo" failed with error code "1"

So, is there a way to clean out the old GRUB using the "Rescue" option
on the alternative install CD? i.e. removeitcompletely. Or do I need
to hunt down an MS-Dos utility that I can stick on a floppy?
-- 
Cheers,
SDM -- a 21st century schizoid man
Systems Theory internet music project links:
official site <www.systemstheory.net>
soundclick <www.soundclick.com/systemstheory>
garageband <www.garageband.com/artist/systemstheory>
"Soundtracks For Imaginary Movies" CD released Dec 2004
"Codetalkers" CD coming Nov 2006
NP: nothing