Then put Landscape and Portrait in option, add message saying you need to restart radio to change orientation, save preferences and next time radio is started it will load in particular orientation.

I guess some app used flow layout to change the layouts between portrait and landscape (which is definitely harder as per my experience as well) and some other app probably used multiple controls (elements are designed fro two views separately, show one that is useable in current view while hiding other). In my case (http://talk.maemo.org/showthread.php...ghlight=nepcal check the screenshots, its not autoflow or hiding something but repositioning based on orientation of hildon-menu at startup), I used hardcoded positions (pixels), these values has different values in terms of positions and size depending upon current layout. Or maybe even design two separate UI and load one according to preference.

I am not good at those things, take those suggestions as one from noobs. I might be missing lots of issues that may arise while implementing those values.