Boot to FC4

[Rapid Sun]

Hi ALL,
I have installed FC 4 as dual boot with XP.
My / partition is /dev/hda3 and swap partition is /dev/hda4 .
I have cleared the MBR with command: fdisk /mbr
I can boot to Redhat 9 with this command: vmlinuz root=/dev/hda3
But with FC4, I can't use this command.  
How can I boot into FC4?
Rapid
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