I've been searching and trying things for days and i'm here to tell you im confused as heck and cant get nothing to work. Senario: FileName = test.bin In a hex editor i can goto offset 0x350 and i see example "Please Change Me Now" But i want it changed to "Changed" or what ever. Ok 2 delimas i'm running into is one changing this hex value, and the other is when you wright "Changed" it leaves "Change Me Now" still in the test.bin file. I would also like to know how to change these values to null or 00's in the hex value becuase they are no longer needed. Really what i'm looking for is some sample code if at all possible because i really am confused. And the closest i've found in the forums is this post http://www.autoitscript.com/forum/index.php?showtopic=12604 But that even confuses me more. I'd even be happy if someone knew of a commandline utility that would accomplish the same thing but googling for days hasn't brought much help either. Any help would be appreciated. Thanks