iqview and multidisplays with windows seven

Bonjour,
I worked with iqview 2.6 very classically with 3 displays : one for administration and two displays stretched in wide view for iqview.
I have to change my workstations.
It is not longer possible with windows 7 to create wide view with two displays, i have only cloning or dual viewing. it's a limitation from the OS and not from graphic cards.
So, how can i work with iqview and administration with 3 displays ?
Thank you

Oups!!
It's possible to extend window of iqview on 2 displays.
sorry for the inconveniance