Matrox NVidia FSX DVI Output

I have two TripleHead2Go Digital screen extenders configured throught the Matrox GXM utility. I'm running the Matrox units off of the two DVI outputs on my NVidia GTX480. FSX displays properly on one of the 3-monitor sets coming out of the graphics card. Using the Matrox utility you're supposed to be able to get FSX to display on all 6 monitors (ASUS 27" HDMI monitors).

Matrox technical support checked my Matrox configuration and found it to be proper. However, they said that I needed to "combine" the two outputs from the card so that FSX would display on all 6 monitors. I cannot find any references to such a combined output. The said check with NVidia. Still no joy.

Is someone out there using this particular setup to display FSX and how do you get the app to display on all the monitors. Note: In my setup you cannot get the open window to stretch across all the monitors. The remaining 3 monitors only display a black screen.

Thanks

Frank