potrstuvich,
The data sheet specifies the gate drive voltage, Rg, Id and Vds.? A MOSFET is almost always specified with an inductive load which means the load current is essentially constant during switching.? Therefore, your test circuit should use Rg and Vg in the gate and a current source connected to the drain.? The drain voltage should be clamped to a maximum voltage of the Vds spec.?
Regarding Cgd in the model, you should be able to get a sense of whether the model is reasonable given the data sheet value.? Someone else suggest you should also look at the Qgs spec, and I agree.
The net net is that you can build a test circuit to get a reasonable engineering estimate of the "goodness" of the model.
Rick