Starting Linux in Single mode with selinux=enforcing

[Ronny]

Hi all I have enabled selinux to enforcing mode but when I rebooted I 
get Kernel Panic I know I made a mistake didn't create policies.So how 
do I boot in sinlge mode to edit the line back to its original.
  Am using Fedora Core 3 with grub but can't go to single mode.
Thanks in advance
Ronny
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