Moss?! No way!
I can see why Brett would want him -- Moss always seems to have his best games against the Packers.
I'm against it though, for a couple of reasons. The main thing is Moss' work ethic, or lack thereof. I just don't think Brett will be able to influence that, and I think that will lead to frustration all around. (Brett trying to knock some sense into Moss, Moss not appreciating the knocking and getting all sullen, etc., etc.)
I think Moss' moment has passed. He's a guy who had great athletic potential but his (horrible) personality just got in the way. I think the time for that potential to go somewhere serious is already gone, and it'd be a waste of time, energy, and money for the Packers to take him on.