If it's got the HK firmware/CSC on it, it will update to the latest for that region; where you are now is irrelevant, it reads the CSC info off the phone to determine what firmware to upgrade to, assuming there is a later firmware for that region.
But it's a moot point. Why would you use Kies for anything ? Flash whatever stock rom for whatever region you want with Odin.
If it's important enough to cause you grief if it's lost, back it up. No excuses
Trolling for thanks is lame
Does Samsung's auto-brightness implementation crap drive you to self-harm ? A solution !
Failure to search is the leading cause of male impotence on XDA
If you don't know how to recover if things go wrong, what are you doing flashing custom roms ?