no, just reinstalled it, as in your guide,

replaced the IATAFamily...
then entered, after booting in Snow Leopard this commands:

sudo chown -R root:wheel /Volumes/YourSnowVolume/System/Library/Extensions/*
sudo chmod -R 755 /Volumes/YourSnowVolume/System/Library/Extensions/*

then:

kextcache -v 1 -t -l -m /System/Library/Caches/com.apple.kext.caches/Startup/Extensions.mkext /System/Library/Extensions

All Commands works and it build the Extensions.mkext !!
But no chance to boot, only with -v -f ... without any command at the beginnig - no working LED from the HDD and the Stop-Sign appears !