Pato is NOT a CF and he won't play in that position. He's a supporting striker. We have 3 CFs and that's it for this season. Beckham is coming and he'll play right winger (right SS, that is) or CAM, when we have to rest Dinho or Seedorf or even Pato. And nobody else is coming, that's it. Leo said that he's satisfied with what he have at the moment.
I disagree that Huntelaar can't fit in our system. That "target-man" thing, that's Borriello, that's not our system. He's a kind of player who operates on 25-30m from goal waiting for a long ball and when he receives it he's spreading it to the side or to the closest teammate. He played that way last season too. Netherlands NT is playing 4-3-3 for ages and Huntelaar fits in it very well (14 goals in 29 appearances for NT so far).
I would also try Borriello on the wing sometimes, that's the way to rest Pato, if we don't want Abate to play another match there.
Borriello played in that position once last summer in America if I'm right.