You get about 30 minutes to edit a post if its the first one in a new thread, and about 15 minutes if it's a post in an existing thread. That's just the way the software works.
Other than that, you have to send a winning lottery ticket to either myself, Vic or Walter, with your request written in perfect grammar on the reverse. Or just PM one of us and we'll do it for you if it doesn't skew the context of the thread.