The line up Numeric posted is not a straight 4-4-2 because, as he already mentioned, Park will spend much of his time in central midfield, with Rooney drifting out left.
Worked a treat against the Rent Boys.
Normally I'd agree that he'd start with Hernandez on the bench, but Fletcher is nowhere near fit enough to start and I can't see him trusting Anderson in such a big game so, I reckon (and hope) the team is exactly as Numeric posted.
The game at the Emirates is not a good example as United simply didn't turn up, it was **** all to do with the formation.
Arsenal didn't even play that well and still (just) managed to win.