How to combine .s2p and .s4p Touchstone files

My design is basically socket (s4p) and trace (s2p) measured using VNA. I would like to combine both the Touchstone files for socket and trace, then use HSPICE to generate a total S-parameter. How do I do that? Thanks.

Do you have ADS or AWR?

you can do it.

Draw pictures so that we can explain in better way.