thanks, i had to tweak a littl to have the First disk ( renamed as DestinationDisk" working.
Modifying the vmx, then launch converter configure feature, make it works :-)
scsi0.present = "true"
scsi0.virtualDev = "buslogic"
scsi0.pciSlotNumber = "16"
scsi0:0.present = "TRUE"
scsi0:0.fileName = "destinationDisk.vmdk" BOOT DISK
scsi0:0.redo = ""
scsi0:1.present = "TRUE"
scsi0:1.fileName = "laurent7-0.vmdk"
scsi0:1.redo = ""