Enable AHCI on Vista

I swapped a Seagate 1.5T 7200.11 in my home computer, and mount it in a new mobile rack as I plan to mount different hard drive for testing.

I just figure out how to enable hotplug and AHCI:

http://www.itwriting.com/blog/288-enabling-ahci-on-vista.html

Vista works fine with AHCI, and you will not run into problems with a new install. However, if you change this setting underneath an installed Vista, it will likely blue-screen on you. The trick is to edit the registry setting here:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci
Edit the Start key and change its value to 0. Then shut down, change the BIOS to AHCI, and reboot. All going well, Vista will detect the change, install new drivers, ask you to reboot once more, and it’s done.