Time for a little psy-ops campaign. I'll bet Al-Hassan isn't having a very nice day in the hands of the Iraqi people. Time to let the others on the loose know that they can surrender to the American forces and have a nice, comfortable stay at Gitmo OR they can be captured and handed over to the new Iraqi government. Add a time limit like "the Americans will start turning over anyone they capture to the Iraqis as of April 15th" and see who lines up to surrender.
Delightfully diabolical!