Could be added this features to the "Desktop and Displays" from the Catalyst software:
Existing: Landscape, Portrait, Landscape (flipped), Portrait (flipped)
To be added: Landscape mirrored, Portrait mirrored
(as if we see the screen in a mirror)
Also to be added for the mouse movement this option:
-switch the mouse move direction synchronized with current screen position (no matter if rotation of the image)
-switch the mouse move synchronized with the image rotation - that is already implemented by default
If will be implemented those features to Catalyst then will be more ways to tweak for the advanced users