>>1607066A few threads back another anon had a similar kind of question. The solution we came up with was to set two different grid sizes in the launcher. Then set the same icons on a section of the grid that will only be seen in one position. I forget the exact way it was worked out, but this should give you a starting place to play around with.
Pic related
This is kind of what the solution ended up being. Evething in the purple area will be on both screens.
The red is only in landscape, blue is only in portrait. So if you can find a way to keep only the portrait stuff in the blue, and landscape stuff in the red you can switch between the two layouts and never have a problem. Just hide the dock or it will say for both layouts