Rob,
I just downloaded the 1680x1050 dual mode layout, and I gotta say, it's awesome. One thing I noticed though is that the main screen is actually full screened and not windowed mode. I had just set them up to be in windowed mode prior to getting this, because I was having trouble with maximizer not working...turns out in the box called "region" you can just indicate a number, but have to spell out "region1" etc.

Is this going to affect toggling between the 2? Thanks for your help.