If you want to be the new Fergie I suggest a lot of whiskey and buy chewing gum in bulk.
Someone had a great review of Ferguson in one of their tactics a while back, the tactic wasnt that great but the in depth was pretty impressive (I'm a liverpool fan and I found it interesting, nuff said). If you can track that down and give it a read and add that to how you want to play and line up then you can make a basic and sturdy tactic and just keep building from there