HPL question: loading multiple tables in parallel

What's the best way to load multiple tables in parallel using HPL? - define one load job per table, and run the jobs simultaneously, or - define a single load job that includes all of the tables, and let HPL take care of the parallelism If the latter is better, how do you define a single load job that contains a deveice/format/map/table for each table? The generate command seems to assume one device/format/map/table per job. Thanks, Dennis