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.

Remove Network Connection 1, 2, 3 in Windows

Found a way to remove unneeded network connection:
http://www.pcreview.co.uk/forums/thread-102477.php

Go to Start/Run/CMD. At the command prompt, type the following commands and
press enter after each line:

set DEVMGR_SHOW_DETAILS=1
set DEVMGR_SHOW_NONPRESENT_DEVICES=1
start devmgmt.msc

Click the View menu and select Show hidden devices. Right click the device
you want to delete and click Properties. Click the Details tab.

Select Device Instance ID. The value of Device Instance ID is the hardware
key of the device.

For example, if you see the value is Root\Image\0000, the full hardware key
is: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\Root\Image\0000

Then go to Start/Run/Regedit and navigate to the key. The data of the
Driver value is the software key of the device. Delete both the hardware
key and software key.

Added note: Network connections are listed here: 1, 2, 3, 4.....etc:
Start/Run/Regedit

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network\{}