Kext manual installation guide

Run in terminal as root:
cp OpenHaltRestart.kext /System/Library/Extensions
chmod -R 755 /System/Library/Extensions/OpenHaltRestart.kext
chown -R root:wheel /System/Library/Extensions/OpenHaltrestart.kext
rm -R /System/Library/Extensions.mkext
kextload -k /System/Library/Extensions