I have now resorted to creating the 2nd applicastion using Forefox & then closing the Firefox application but it doesn't work perfectly all the time (Website is sometimes faulty)
So it seems I have to go back to looking for a way to identify the seperate window if IE & close that particular instance.
SO...
I AM BACK TO SQUARE ONE
Any ideas, PLEEEEEEASE - (_IEAttach cannot uniquely identify the Window, by the way)