Change IE settings for Active - x control and plugins

We have several computers where we need to change the Registry setting to ENABLE the Internet Zone setting of "Run Active X Controls & Plugins"

Could someone get me started with a script to run this on several remote computers.

The location is 'HKCU:\software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3'
but I do not know what the particular numerical number is for this field, nor the logic to change it to the "ENABLE" mode.

Thanks in advance.