If I were one of Hussein's lookalikes (oh thank goodness I'm not):
1. I would've fled Iraq (if I could smuggle out) lest someone shoot me thinking I'm the real McCoy;
2. Hussein would probably have kept me moving but visible as a decoy and not kept me underground in hiding;
3. When captured, the first thing I would tell my captors would be "I'm not who you think I am!!!"
Of course, I could be wrong. Maybe this guy is the decoy and Hussein is paying a lot of money to this guy's family for him to go down in his place.