I can't see how that would benefit us at all, thanks for the suggestion like. You see the GUI on everything else [XBMC, EVOX, UNLEASH, AVALAUNCH, DVD2XBOX, MAME, APPS, GAMES...] is perfect and fits full screen, so if I tinkered about and adjusted the plasma displays default settings then it would in turn throw everything else out.
I think we somehow need an option in the GUI for Zsnexbox to be made so you can resize it. I can live with it as it is now, but I would be grateful if such an option could be implemented.
all xbox games are made to be "bigger" than your tv, so actually you do are losing some image.
same with all the other apps you mentionned, or you adjusted them.
again, best is to go to service menu and adjust (use a game if you wish). then reset all your homebrew apps to default.