Optimization Goal in ADS for lumped element extrapolation

Dear users,

my objective is to extrapolate a lumped model of a structure that I have simulated with a full-wave simulator.
I have tried to do this task with the Spice Model Generator of @DS (the Narrow Band one) but the number of network topologies is limited and do not include the desired one.

In a tutorial of @DS I've read that there is the possibility to construct a circuit with the desired topology and start an optimization task to find the lumped parameters values that return a given behaviour of S-Parameters.

Therefore, my problem is that to give to @DS a Touchstone file (.sp2, exported by full-wave simulator) and start the optimization task with this goal.
What is the procedure?

Thanks in advance

In other term, my scope is to give, as goal of the optimization task, a touchstone file with S-parameter simulated result.