ok, that doesn't make much sense.

you say you do not know how to add a second display, yet in the previous line you say 'both are standard widescreen'... 'both' implying 2 monitors.

i will assume you have 2 screens... in vertical span mode... meaning windows sees both screens as one long screen with a resolution of 1680x2100 (each screen set to 1680x1050)

i would imagine the layout editor is a bit small... and it would be tough to work with.

i would set the game resolution for all your regions to 1680x1050 ... and set the dimensions for all the smaller ones to 840,525

i hope that helps. let me know what you end up with

Rob