Originally Posted by blackknight

You need to use the AppleATIATA.kext for SL. I can't remember where I saw it, but I think it was on insanelymac.com forums in the hardware section. I personally just use AHCI as it always works in OS X, but I have it just in case. I also have a modified AppleOnboardPCATA.kext that is modified the same way as the leopard version as it seems to enable the 5th and 6th SATA ports when set to IDE mode for DVD-Roms. It was also found on insanelymac.com, but like I said, I usually use AHCI as it works the easiest.