If Gabbys not fit I'd go with:
Friedel
Walker, Dunne, Collins, Clark
Albrighton, Makoun, Reo-Coker, Downing
Young
Bent
If he is fit, drop Albrighton to the bench (impact sub 2nd half), have Young and Downing switching wings and Gabby just off bent terrorising Vidic.
I reckon we might manage a draw, my only worry is Rooney. Hes been awful lately, but off-form players always seem to find their form against us.