James Giddens, the trustee liquidating MF Global Inc., said that he planned to work with customers in a lawsuit against Jon Corzine and other former brokerage executives, helping to prosecute claims and eventually distributing any money they recovered to claimants, Bloomberg News reported yesterday. Giddens struck a "cooperation agreement" with lawyers for the plaintiffs, whom he will help assert "all possible claims and legal theories for recovery," he said. Working with them on a lawsuit already in progress in federal court in Manhattan, he said that he will not be duplicating their efforts.