james, I know that you can do what you want in MSFS, but I don't know if it can be done in AH. To do it in FS you have to open the gauges in another window and move that window to your second monitor iirc. Something I don't think you can do in AH.
I think you can do a set up like MrRipley is talking about but I believe the views will be slaved together, moving together as you move your view around.