For those who use an external display with their laptop - can you rotate the desktop image (via driver software) of the external display by 90 degrees while keeping the actual LCD display attached to the base unit unrotated?  In other words, the external display (which is physically rotated using one of those display stands you see in banks etc) shows 'normally' after rotation while the attached laptop display shows 'normally' without the laptop being put on its side. Plus of course both displays show different things.

So I'd like to see the external display have a greater height than width and the laptops display have a greater width than height. 

This effect would be done using the OS drivers (I'm asking people running Windows of any version).

Thanks!