ID3 vTOPE NPRTCOM Kim MastersTALB All Things ConsideredTIT2 - 'Pirates' May Not Save the Summer Box OfficeTCOP 2006TRCK 18TCON MoviesCOMM nprComment Johnny Depp will be swashbuckling once again this weekend in Pirates of the Caribbean: Dead Man's Chest. The picture is expected to have a huge opening, but this juggernaut won't be enough to overcome a mediocre box-office performance for the summer.TPE1 NPRTYER 2006 P , j3'