Payton doesn't necessarily have a designated OF position, right? I don't think I've seen him play LF, but I'd assume he'd be happy in CF or RF. If Payton went to Florida, I don't see him starting in right because of Miguel Cabrera's .336 BA to go along with 61 RBI and 16 HR. In CF, the Marlins have Juan Pierre, who's a career .307 hitter so thinking about it, if Payton wants playing time, Florida may not be the ideal place unless he wants to continue being another fourth OFer.
Back to the Brew Crew and getting Overbay, what trade would work? They probably have too deep of an OF for Payton to be involved in a trade. I look through Milwaukee's farm system, and they don't really have anything special at the catching position in AAA or AA, so if we wanted Overbay, since we have V-tek and Mirabelli locked up for a while, Shoppach and others in a deal could be possible.