Isn't it meant to be that, for a particular parameters set and a given date & time, one timer0 will produce one seed and another timer0 will produce another seed? The timer0 is part of the parameters that determine what seed you hit in the first place. In your example for instance, lets say that to hit seed xxxxXXXX on 1st Jan 2012 at 00:00:30, you would need your timer0 to be C7F. If you successfully get C7F as your timer0 the game will be seeded with xxxxXXXX, but if you hit C7E as your timer0 the game could be seeded with XxXXxxxX instead. Wasn't all that clear if that was indeed what you meant or not.