Open dialog boxes on same monitor as program

I use a multiple monitor setup on Windows 7. It's very convenient for working with my files on the main monitor and then dragging them into WinSCP on the secondary. There's just one minor annoyance: when I do so, the progress dialog box open on the edge of the monitor I dragged out of instead of the monitor I dragged into, where WinSCP is. It would be very nice if dialog boxes opened by default on the same monitor that the main WinSCP window is on.