IE 9 - How To Increase Number Of Simultaneous Downloads

What is the "correct" way to increase the number of simutaneous downloads under IE9. I read that prior to IE8 that the number of downloads was limited to 2 for HTTP 1.1 and 4 for HTTP 1.0. Per MS, in IE8 this was increased to 6 and 6 and they provided a Fix-It to go up to 10 and 10. It appears that IE9 is back to 2 and 4? I found 3 different options on how to change the registry to provide an increase.

1. Appears to be the hack of choice prior to IE8, but claims are it will work on IE9.
HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionInternetSettings
add two DWORD (32bit) Values and Value data
MaxConnectionsPerServer
MaxConnectionsPer1_0Server

2. MS advised regarding IE8:
HKEY_LOCAL_MACHINESoftwareMicrosoftInternetExplorerMAINFeatureControlFEATURE_MAXCONNECTIONSPER SERVER and modify the existing value data
HKEY_LOCAL_MACHINESoftwareMicrosoftInternetExplorerMAINFeatureControlFEATURE_MAXCONNECTIONSPER 1_0SERVER
and modify the existing value data

3. MS advised to utilize the Group Policy
Administrative Templates>Windows Components>Internet Explorer>Security Features>AJAX then set the desired number of connections.

I first tried option 3, but could not detect any change to the registry areas stated in 1 or 2 so not sure what this group policy setting changes. Option 2 seemed the most logical since the sub-keys were already there and HKLM makes system wide changes vs HKLU which also needs more entries. Interested in knowing what the best way to do this is and what data values you are using.