How to get clamshell mode with Windows 7 on Macbook Pro?

Question

Hi,
I am running Windows 7 on Macbook Pro using bootcamp. In OS-X, I can use this cool clamshell feature wherein after putting the MBP to sleep by closing the lid, as soon as I connect an external keyboard, mouse & monitor, I get the display on the monitor and immediately start using the keyboard & mouse too, converting the laptop instantaneously to a desktop.
I am trying to do the same thing on Windows 7, close the lid of the laptop to put it to sleep, connect my external monitor, mouse & keyboard, but however the laptop never wakes up (even after moving the mouse & pressing keys in the keyboard). I tried several things in Windows 7. Under Power Options, Disabled "selective Suspend of USB", but that did not help. Next, in the "Device Manager", for the "Root USB Hub" & "Generic USB Hub", I tried to set "Allow this device to wake up the computer", under Properties -> Power Management, but that option is grayed out. I tried to experimented with Sleep types like S1, S2, S3, but except for S3, the other two are shown as "not supported by firmware" (using powercfg option in command line). Countless hours wasted on google search to get this working with no success
I would greatly appreciate any help on this issue.
Thanks,
Sri

Answer 1

@mkultraviolent,
Thanks for the quick reply.
That seems to be a useful workaround, but I do not find the option mentioned in Display/ Nvidia control panel. However, I find an option in the "Power Options" which has a "Do Nothing" option in the combo box to select what "Closing the Lid" does. Is that what u are referring to?
Also, one problem in this approach is, if we do not sleep when the display is closed, that will keep the internal display (laptop's display) running in clamshell mode even after the lid is closed? (which will heat up the laptop badly).
The exact option I am looking for is, while the laptop is in sleep & lid closed state, connecting the external keyboard/mouse/monitor and pressing a key in the keyboard or moving the mouse should wake the computer from sleep. If this happens, the internal display won't be running. I am able to achieve this in OS-X.
In Windows7, I have a workaround by which I can almost achieve this result, wherein, while the laptop is in lid-closed, sleeping state, after connecting the external devices (keyboard/mouse/monitor), I open the laptop's lid for a fraction of second, quickly move my finger over the touchpad & close the lid again. This wakes up the laptop, & while it is waking up, Windows realizes that the lid is closed and that external devices are connected and gets into clamshell mode (I have verified that in this state, the internal display is not running).
This workaround was fine so far, but I got this hengedocks docking station for my macbook, and I am no longer able to use the workaround, because, after plugging my macbook into the docking station, I cannot open the lid. So, the only option is to make Windows7 realize that external devices are connected & wake up on external keyboard stimuli (Hence the question).
If my question is not clear, this video kind of explains what I want to achieve:
http://www.youtube.com/watch?v=YOKu9uwdwZI&feature=player_embedded
Appreciate ur help!