SATA: from IDE to AHCI

How to enable the AHCI drivers via the registry:
http://support.microsoft.com/kb/922976
How to force the load of the AHCI driver from the Windows GUI:
http://www.eggheadcafe.com/softwar [...] taide.aspx
I edited the registry to enable the driver. Rebooted, catching the BIOS screen to change to AHCI. BAM! It is running using AHCI now.
http://www.tomshardware.com/forum/244840-32-convert-sata-ahci-vista
Edit the registry to enable the driver. Reboot, catching the BIOS screen to change to AHCI.
It is running using AHCI now.
http://www.techarp.com/showfreebog.aspx?lang=0&bogno=313
I installed with IDE. Found a registry setting that allows you to switch to AHCI mode after installing HKLM\System\CurrentControlSet\Services\msahci\Start needs to be 0 for AHCI to be active