1) This isn't urgent.
2) Find Hopper8's 'Odin troubleshooting' thread stickied in the General section, try as much of the stuff in that thread as you need to in order to get a successful flash because this is the only way you're fixing it.
Edit - Stock roms are available from Samfirmware, AndroidFirmwares.net or Samsung-Updates.com
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 ?