Here is what I've found:
you have to manually add gen PL and define CS, IS and UN source codes the way it's displayed. LA will be created automatically after all is saved
Product Line Definition Product Line GEN LauNT or Unix No iSeries RPG ILE No
System System Name Release CS CASE SUPPORT Release 9.0.1 IS INTERNAL SUPPORT Release 9.0.1 LA UN universe Release 9.0.1
Alex