Let the players go on a team building weekend.
First they get dropped at the bottom of a hill/mountain. They then have to hike up to a per-determined campsite. The boys will have loads of fun and create some great memories trying to put up tents and start a fire. After they've done that they can do the first day's activity, paintballing in the forest. It'll give them a sense of unity, and hopefully make them realise that the flanks aren't the only option of attack. At the end of the day they can sit around the fire and listen to Giggs tell tales of the glory days, whilst they all eat roast marshmallows. On the second day they can do one of those high rope/leap of faith things, except instead of jumping off a pole and trying to touch a flag or something, they have to try and high-five David Moyes. The warm feeling from successfully completing a high-five, coupled with the adrenaline rush from jumping off something high will help the players build a relationship with the new manager. Once they've done that they all have to stand in a line, then one by one, Moyes will go behind them and they have to fall backwards into his arms. This will help them build a sense of trust with David, and they'll realise that he is always there for them. After all of this fun, they'll get to create even more fun memories as they try and take down the tents, remembering to clear up any litter they may have lying around, and hike back down to the coach to go home. All in all it'll be good fun and they'll all get along better as a result.