his guide works ok for me. Serial-ATA devices works ok with his kext too. Full 64 bit support too.
i cant get VoodoHDA working with the extra folder, i have to install it into S/L/E. So im waiting for a AppleHDA so its still kinda untouch in the S/L/E. i used the latest Chameleon which is 640 i think and the snow leopard boot support. Before you led me to airwalks post, i used teknojunkies snow files and i just copy and pasted it to my extra folder and it worked right away 32/64.