Nah, I will start over with them. All competitions will be fresh from here, so that all the winners can be placed in that thread.
Everything will be freshly done because, as you said, going back and trying to find all the winners would just be a pain. The Grand Prix was a once a year thing (that's why it's Grand Prix - 2010), so it was added, and it wasn't done too long ago.
The next person who is put in there will be the winner of the sig of the moment.