RobotStudio event

Virtual system with an IRB 6620LX and ABB Workpiece Positioners?

Hello, I am trying to create a virtual system in RobotStudio 6.01 of an IRB 6620LX and a ABB workpiece positioner. All the other robots are part of the standard library, which means that I can add the robot and positioner to an empty station followed by using the system builder from layout to build the system (create controller, task ...). Unfortunately, the IRB 6620LX is not part of the standard library so I cannot use the system builder from layout. Does anybody know how to do it? Thanks, Max