You can adapt by creating a "rotate device" message. Create a Top layer for all layouts. Draw a large Black sprite and cover the entire layout. Place a "Rotate Device" message in the form of an image. Remember to set the parallax to 0,0 and the scale rate to 0 in the properties dialog for the layer. Use the browser object:
Brower is Portrait > Layer Top > Set InVisible
___________________________________>Set time scale 0.0 (pauses the game)
Brower is Landscape > Layer Top > Set Visible
___________________________________>Set time scale 1.0 (resumes game)