No way do you retire his number, that's reserved for the elite of the elite and while he was a great back for us I wouldn't consider him in the top six Packers of all time (only Tony Canadeo, Don Hutson, Bart Starr, Ray Nitschke, and Reggie White have their numbers retired... Favre to follow eventually). That said he definitely belongs in the Packers Hall of Fame and I'd love it if he got the chance to retire a Packer when he decides he wants to hang up the cleats.
Born and bred a cheesehead