Restore Grub

["admin kclinux net" <admin kclinux net>]

I have a client that develops in both Windows and Linux.  They're using 
desktops that used to dual boot Windows 2000 and Fedora Core 2.  We're 
about to roll out Windows XP Pro to each of the workstations, and when I 
tested on one of them today, the Windows XP install wrote over the MBR 
and now Grub no longer comes up, just boots straight into Windows XP.  I 
searched the archived and say "grub-install \dev\hda" as a suggestion, 
but when I boot off the FC2 CD, it doesnt have grub-install anywhere on 
the CD.  Can someone give me another suggestion?