Once you are happy with the biasing components you will need to disable the DC simulation component and enable the SP component. (Right click the component and then select the "component-activate/deactivate" menu item.) If you decide to use the SPICE model to predict the S parameters then you will need to take no further action. If you want to use the measured parameters you will need to descend into the hierarchy of the device and follow the instructions on the schematic to select the appropriate model. The S parameter files are held in the CA2013_prj\data\bfp640 directory. An explanation of how the file names relate to the bias conditions is included in the "BFP640 S parameter files" PDF available on Moodle.