Crack "country flag" location on BlackBerry Messenger.

Hi Everyone, In blackberry messenger if I choose to show location it automatically chooses the country flag I'm in. If I just change my time zone, it still shows as the original country flag. How to have a different flag displayed in the blackberry messenger location? It might not be possible, but I'm curious if anyone can crack it where I could use whatever flag I want? (I attached picture for a clearer idea of what I mean). Thanks! Rimini