generally you cannot "convert software" which is what you asked,
compiled games etc are well, compiled, You can't go back and make a boiled egg from scrambled eggs. So unless you get hold of the source code and you know the finer points of video standards - yer outta luck.
The second part of the answer is that you can *sometimes* get a (say) NTSC film or game to run if the player application can also handle the output streams in different formats eg PAL, SECAM. NTSC etc. a combination of soft and hardware is needed.
The region thing is something I'll leave to the experts.